amplitude.js

(function (global, factory) {
	typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
	typeof define === 'function' && define.amd ? define(factory) :
	(global.amplitude = factory());
}(this, (function () { 'use strict';

var commonjsGlobal = typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};





function createCommonjsModule(fn, module) {
	return module = { exports: {} }, fn(module, module.exports), module.exports;
}

var json3 = createCommonjsModule(function (module, exports) {
/*! JSON v3.3.2 | http://bestiejs.github.io/json3 | Copyright 2012-2014, Kit Cambridge | http://kit.mit-license.org */
(function () {
  // Detect the `define` function exposed by asynchronous module loaders. The
  // strict `define` check is necessary for compatibility with `r.js`.
  var isLoader = typeof undefined === "function" && undefined.amd;

  // A set of types used to distinguish objects from primitives.
  var objectTypes = {
    "function": true,
    "object": true
  };

  // Detect the `exports` object exposed by CommonJS implementations.
  var freeExports = objectTypes['object'] && exports && !exports.nodeType && exports;

  // Use the `global` object exposed by Node (including Browserify via
  // `insert-module-globals`), Narwhal, and Ringo as the default context,
  // and the `window` object in browsers. Rhino exports a `global` function
  // instead.
  var root = objectTypes[typeof window] && window || this,
      freeGlobal = freeExports && objectTypes['object'] && module && !module.nodeType && typeof commonjsGlobal == "object" && commonjsGlobal;

  if (freeGlobal && (freeGlobal["global"] === freeGlobal || freeGlobal["window"] === freeGlobal || freeGlobal["self"] === freeGlobal)) {
    root = freeGlobal;
  }

  // Public: Initializes JSON 3 using the given `context` object, attaching the
  // `stringify` and `parse` functions to the specified `exports` object.
  function runInContext(context, exports) {
    context || (context = root["Object"]());
    exports || (exports = root["Object"]());

    // Native constructor aliases.
    var Number = context["Number"] || root["Number"],
        String = context["String"] || root["String"],
        Object = context["Object"] || root["Object"],
        Date = context["Date"] || root["Date"],
        SyntaxError = context["SyntaxError"] || root["SyntaxError"],
        TypeError = context["TypeError"] || root["TypeError"],
        Math = context["Math"] || root["Math"],
        nativeJSON = context["JSON"] || root["JSON"];

    // Delegate to the native `stringify` and `parse` implementations.
    if (typeof nativeJSON == "object" && nativeJSON) {
      exports.stringify = nativeJSON.stringify;
      exports.parse = nativeJSON.parse;
    }

    // Convenience aliases.
    var objectProto = Object.prototype,
        getClass = objectProto.toString,
        isProperty, forEach, undef;

    // Test the `Date#getUTC*` methods. Based on work by @Yaffle.
    var isExtended = new Date(-3509827334573292);
    try {
      // The `getUTCFullYear`, `Month`, and `Date` methods return nonsensical
      // results for certain dates in Opera >= 10.53.
      isExtended = isExtended.getUTCFullYear() == -109252 && isExtended.getUTCMonth() === 0 && isExtended.getUTCDate() === 1 &&
        // Safari < 2.0.2 stores the internal millisecond time value correctly,
        // but clips the values returned by the date methods to the range of
        // signed 32-bit integers ([-2 ** 31, 2 ** 31 - 1]).
        isExtended.getUTCHours() == 10 && isExtended.getUTCMinutes() == 37 && isExtended.getUTCSeconds() == 6 && isExtended.getUTCMilliseconds() == 708;
    } catch (exception) {}

    // Internal: Determines whether the native `JSON.stringify` and `parse`
    // implementations are spec-compliant. Based on work by Ken Snyder.
    function has(name) {
      if (has[name] !== undef) {
        // Return cached feature test result.
        return has[name];
      }
      var isSupported;
      if (name == "bug-string-char-index") {
        // IE <= 7 doesn't support accessing string characters using square
        // bracket notation. IE 8 only supports this for primitives.
        isSupported = "a"[0] != "a";
      } else if (name == "json") {
        // Indicates whether both `JSON.stringify` and `JSON.parse` are
        // supported.
        isSupported = has("json-stringify") && has("json-parse");
      } else {
        var value, serialized = '{"a":[1,true,false,null,"\\u0000\\b\\n\\f\\r\\t"]}';
        // Test `JSON.stringify`.
        if (name == "json-stringify") {
          var stringify = exports.stringify, stringifySupported = typeof stringify == "function" && isExtended;
          if (stringifySupported) {
            // A test function object with a custom `toJSON` method.
            (value = function () {
              return 1;
            }).toJSON = value;
            try {
              stringifySupported =
                // Firefox 3.1b1 and b2 serialize string, number, and boolean
                // primitives as object literals.
                stringify(0) === "0" &&
                // FF 3.1b1, b2, and JSON 2 serialize wrapped primitives as object
                // literals.
                stringify(new Number()) === "0" &&
                stringify(new String()) == '""' &&
                // FF 3.1b1, 2 throw an error if the value is `null`, `undefined`, or
                // does not define a canonical JSON representation (this applies to
                // objects with `toJSON` properties as well, *unless* they are nested
                // within an object or array).
                stringify(getClass) === undef &&
                // IE 8 serializes `undefined` as `"undefined"`. Safari <= 5.1.7 and
                // FF 3.1b3 pass this test.
                stringify(undef) === undef &&
                // Safari <= 5.1.7 and FF 3.1b3 throw `Error`s and `TypeError`s,
                // respectively, if the value is omitted entirely.
                stringify() === undef &&
                // FF 3.1b1, 2 throw an error if the given value is not a number,
                // string, array, object, Boolean, or `null` literal. This applies to
                // objects with custom `toJSON` methods as well, unless they are nested
                // inside object or array literals. YUI 3.0.0b1 ignores custom `toJSON`
                // methods entirely.
                stringify(value) === "1" &&
                stringify([value]) == "[1]" &&
                // Prototype <= 1.6.1 serializes `[undefined]` as `"[]"` instead of
                // `"[null]"`.
                stringify([undef]) == "[null]" &&
                // YUI 3.0.0b1 fails to serialize `null` literals.
                stringify(null) == "null" &&
                // FF 3.1b1, 2 halts serialization if an array contains a function:
                // `[1, true, getClass, 1]` serializes as "[1,true,],". FF 3.1b3
                // elides non-JSON values from objects and arrays, unless they
                // define custom `toJSON` methods.
                stringify([undef, getClass, null]) == "[null,null,null]" &&
                // Simple serialization test. FF 3.1b1 uses Unicode escape sequences
                // where character escape codes are expected (e.g., `\b` => `\u0008`).
                stringify({ "a": [value, true, false, null, "\x00\b\n\f\r\t"] }) == serialized &&
                // FF 3.1b1 and b2 ignore the `filter` and `width` arguments.
                stringify(null, value) === "1" &&
                stringify([1, 2], null, 1) == "[\n 1,\n 2\n]" &&
                // JSON 2, Prototype <= 1.7, and older WebKit builds incorrectly
                // serialize extended years.
                stringify(new Date(-8.64e15)) == '"-271821-04-20T00:00:00.000Z"' &&
                // The milliseconds are optional in ES 5, but required in 5.1.
                stringify(new Date(8.64e15)) == '"+275760-09-13T00:00:00.000Z"' &&
                // Firefox <= 11.0 incorrectly serializes years prior to 0 as negative
                // four-digit years instead of six-digit years. Credits: @Yaffle.
                stringify(new Date(-621987552e5)) == '"-000001-01-01T00:00:00.000Z"' &&
                // Safari <= 5.1.5 and Opera >= 10.53 incorrectly serialize millisecond
                // values less than 1000. Credits: @Yaffle.
                stringify(new Date(-1)) == '"1969-12-31T23:59:59.999Z"';
            } catch (exception) {
              stringifySupported = false;
            }
          }
          isSupported = stringifySupported;
        }
        // Test `JSON.parse`.
        if (name == "json-parse") {
          var parse = exports.parse;
          if (typeof parse == "function") {
            try {
              // FF 3.1b1, b2 will throw an exception if a bare literal is provided.
              // Conforming implementations should also coerce the initial argument to
              // a string prior to parsing.
              if (parse("0") === 0 && !parse(false)) {
                // Simple parsing test.
                value = parse(serialized);
                var parseSupported = value["a"].length == 5 && value["a"][0] === 1;
                if (parseSupported) {
                  try {
                    // Safari <= 5.1.2 and FF 3.1b1 allow unescaped tabs in strings.
                    parseSupported = !parse('"\t"');
                  } catch (exception) {}
                  if (parseSupported) {
                    try {
                      // FF 4.0 and 4.0.1 allow leading `+` signs and leading
                      // decimal points. FF 4.0, 4.0.1, and IE 9-10 also allow
                      // certain octal literals.
                      parseSupported = parse("01") !== 1;
                    } catch (exception) {}
                  }
                  if (parseSupported) {
                    try {
                      // FF 4.0, 4.0.1, and Rhino 1.7R3-R4 allow trailing decimal
                      // points. These environments, along with FF 3.1b1 and 2,
                      // also allow trailing commas in JSON objects and arrays.
                      parseSupported = parse("1.") !== 1;
                    } catch (exception) {}
                  }
                }
              }
            } catch (exception) {
              parseSupported = false;
            }
          }
          isSupported = parseSupported;
        }
      }
      return has[name] = !!isSupported;
    }

    if (!has("json")) {
      // Common `[[Class]]` name aliases.
      var functionClass = "[object Function]",
          dateClass = "[object Date]",
          numberClass = "[object Number]",
          stringClass = "[object String]",
          arrayClass = "[object Array]",
          booleanClass = "[object Boolean]";

      // Detect incomplete support for accessing string characters by index.
      var charIndexBuggy = has("bug-string-char-index");

      // Define additional utility methods if the `Date` methods are buggy.
      if (!isExtended) {
        var floor = Math.floor;
        // A mapping between the months of the year and the number of days between
        // January 1st and the first of the respective month.
        var Months = [0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334];
        // Internal: Calculates the number of days between the Unix epoch and the
        // first day of the given month.
        var getDay = function (year, month) {
          return Months[month] + 365 * (year - 1970) + floor((year - 1969 + (month = +(month > 1))) / 4) - floor((year - 1901 + month) / 100) + floor((year - 1601 + month) / 400);
        };
      }

      // Internal: Determines if a property is a direct property of the given
      // object. Delegates to the native `Object#hasOwnProperty` method.
      if (!(isProperty = objectProto.hasOwnProperty)) {
        isProperty = function (property) {
          var members = {}, constructor;
          if ((members.__proto__ = null, members.__proto__ = {
            // The *proto* property cannot be set multiple times in recent
            // versions of Firefox and SeaMonkey.
            "toString": 1
          }, members).toString != getClass) {
            // Safari <= 2.0.3 doesn't implement `Object#hasOwnProperty`, but
            // supports the mutable *proto* property.
            isProperty = function (property) {
              // Capture and break the object's prototype chain (see section 8.6.2
              // of the ES 5.1 spec). The parenthesized expression prevents an
              // unsafe transformation by the Closure Compiler.
              var original = this.__proto__, result = property in (this.__proto__ = null, this);
              // Restore the original prototype chain.
              this.__proto__ = original;
              return result;
            };
          } else {
            // Capture a reference to the top-level `Object` constructor.
            constructor = members.constructor;
            // Use the `constructor` property to simulate `Object#hasOwnProperty` in
            // other environments.
            isProperty = function (property) {
              var parent = (this.constructor || constructor).prototype;
              return property in this && !(property in parent && this[property] === parent[property]);
            };
          }
          members = null;
          return isProperty.call(this, property);
        };
      }

      // Internal: Normalizes the `for...in` iteration algorithm across
      // environments. Each enumerated key is yielded to a `callback` function.
      forEach = function (object, callback) {
        var size = 0, Properties, members, property;

        // Tests for bugs in the current environment's `for...in` algorithm. The
        // `valueOf` property inherits the non-enumerable flag from
        // `Object.prototype` in older versions of IE, Netscape, and Mozilla.
        (Properties = function () {
          this.valueOf = 0;
        }).prototype.valueOf = 0;

        // Iterate over a new instance of the `Properties` class.
        members = new Properties();
        for (property in members) {
          // Ignore all properties inherited from `Object.prototype`.
          if (isProperty.call(members, property)) {
            size++;
          }
        }
        Properties = members = null;

        // Normalize the iteration algorithm.
        if (!size) {
          // A list of non-enumerable properties inherited from `Object.prototype`.
          members = ["valueOf", "toString", "toLocaleString", "propertyIsEnumerable", "isPrototypeOf", "hasOwnProperty", "constructor"];
          // IE <= 8, Mozilla 1.0, and Netscape 6.2 ignore shadowed non-enumerable
          // properties.
          forEach = function (object, callback) {
            var isFunction = getClass.call(object) == functionClass, property, length;
            var hasProperty = !isFunction && typeof object.constructor != "function" && objectTypes[typeof object.hasOwnProperty] && object.hasOwnProperty || isProperty;
            for (property in object) {
              // Gecko <= 1.0 enumerates the `prototype` property of functions under
              // certain conditions; IE does not.
              if (!(isFunction && property == "prototype") && hasProperty.call(object, property)) {
                callback(property);
              }
            }
            // Manually invoke the callback for each non-enumerable property.
            for (length = members.length; property = members[--length]; hasProperty.call(object, property) && callback(property));
          };
        } else if (size == 2) {
          // Safari <= 2.0.4 enumerates shadowed properties twice.
          forEach = function (object, callback) {
            // Create a set of iterated properties.
            var members = {}, isFunction = getClass.call(object) == functionClass, property;
            for (property in object) {
              // Store each property name to prevent double enumeration. The
              // `prototype` property of functions is not enumerated due to cross-
              // environment inconsistencies.
              if (!(isFunction && property == "prototype") && !isProperty.call(members, property) && (members[property] = 1) && isProperty.call(object, property)) {
                callback(property);
              }
            }
          };
        } else {
          // No bugs detected; use the standard `for...in` algorithm.
          forEach = function (object, callback) {
            var isFunction = getClass.call(object) == functionClass, property, isConstructor;
            for (property in object) {
              if (!(isFunction && property == "prototype") && isProperty.call(object, property) && !(isConstructor = property === "constructor")) {
                callback(property);
              }
            }
            // Manually invoke the callback for the `constructor` property due to
            // cross-environment inconsistencies.
            if (isConstructor || isProperty.call(object, (property = "constructor"))) {
              callback(property);
            }
          };
        }
        return forEach(object, callback);
      };

      // Public: Serializes a JavaScript `value` as a JSON string. The optional
      // `filter` argument may specify either a function that alters how object and
      // array members are serialized, or an array of strings and numbers that
      // indicates which properties should be serialized. The optional `width`
      // argument may be either a string or number that specifies the indentation
      // level of the output.
      if (!has("json-stringify")) {
        // Internal: A map of control characters and their escaped equivalents.
        var Escapes = {
          92: "\\\\",
          34: '\\"',
          8: "\\b",
          12: "\\f",
          10: "\\n",
          13: "\\r",
          9: "\\t"
        };

        // Internal: Converts `value` into a zero-padded string such that its
        // length is at least equal to `width`. The `width` must be <= 6.
        var leadingZeroes = "000000";
        var toPaddedString = function (width, value) {
          // The `|| 0` expression is necessary to work around a bug in
          // Opera <= 7.54u2 where `0 == -0`, but `String(-0) !== "0"`.
          return (leadingZeroes + (value || 0)).slice(-width);
        };

        // Internal: Double-quotes a string `value`, replacing all ASCII control
        // characters (characters with code unit values between 0 and 31) with
        // their escaped equivalents. This is an implementation of the
        // `Quote(value)` operation defined in ES 5.1 section 15.12.3.
        var unicodePrefix = "\\u00";
        var quote = function (value) {
          var result = '"', index = 0, length = value.length, useCharIndex = !charIndexBuggy || length > 10;
          var symbols = useCharIndex && (charIndexBuggy ? value.split("") : value);
          for (; index < length; index++) {
            var charCode = value.charCodeAt(index);
            // If the character is a control character, append its Unicode or
            // shorthand escape sequence; otherwise, append the character as-is.
            switch (charCode) {
              case 8: case 9: case 10: case 12: case 13: case 34: case 92:
                result += Escapes[charCode];
                break;
              default:
                if (charCode < 32) {
                  result += unicodePrefix + toPaddedString(2, charCode.toString(16));
                  break;
                }
                result += useCharIndex ? symbols[index] : value.charAt(index);
            }
          }
          return result + '"';
        };

        // Internal: Recursively serializes an object. Implements the
        // `Str(key, holder)`, `JO(value)`, and `JA(value)` operations.
        var serialize = function (property, object, callback, properties, whitespace, indentation, stack) {
          var value, className, year, month, date, time, hours, minutes, seconds, milliseconds, results, element, index, length, prefix, result;
          try {
            // Necessary for host object support.
            value = object[property];
          } catch (exception) {}
          if (typeof value == "object" && value) {
            className = getClass.call(value);
            if (className == dateClass && !isProperty.call(value, "toJSON")) {
              if (value > -1 / 0 && value < 1 / 0) {
                // Dates are serialized according to the `Date#toJSON` method
                // specified in ES 5.1 section 15.9.5.44. See section 15.9.1.15
                // for the ISO 8601 date time string format.
                if (getDay) {
                  // Manually compute the year, month, date, hours, minutes,
                  // seconds, and milliseconds if the `getUTC*` methods are
                  // buggy. Adapted from @Yaffle's `date-shim` project.
                  date = floor(value / 864e5);
                  for (year = floor(date / 365.2425) + 1970 - 1; getDay(year + 1, 0) <= date; year++);
                  for (month = floor((date - getDay(year, 0)) / 30.42); getDay(year, month + 1) <= date; month++);
                  date = 1 + date - getDay(year, month);
                  // The `time` value specifies the time within the day (see ES
                  // 5.1 section 15.9.1.2). The formula `(A % B + B) % B` is used
                  // to compute `A modulo B`, as the `%` operator does not
                  // correspond to the `modulo` operation for negative numbers.
                  time = (value % 864e5 + 864e5) % 864e5;
                  // The hours, minutes, seconds, and milliseconds are obtained by
                  // decomposing the time within the day. See section 15.9.1.10.
                  hours = floor(time / 36e5) % 24;
                  minutes = floor(time / 6e4) % 60;
                  seconds = floor(time / 1e3) % 60;
                  milliseconds = time % 1e3;
                } else {
                  year = value.getUTCFullYear();
                  month = value.getUTCMonth();
                  date = value.getUTCDate();
                  hours = value.getUTCHours();
                  minutes = value.getUTCMinutes();
                  seconds = value.getUTCSeconds();
                  milliseconds = value.getUTCMilliseconds();
                }
                // Serialize extended years correctly.
                value = (year <= 0 || year >= 1e4 ? (year < 0 ? "-" : "+") + toPaddedString(6, year < 0 ? -year : year) : toPaddedString(4, year)) +
                  "-" + toPaddedString(2, month + 1) + "-" + toPaddedString(2, date) +
                  // Months, dates, hours, minutes, and seconds should have two
                  // digits; milliseconds should have three.
                  "T" + toPaddedString(2, hours) + ":" + toPaddedString(2, minutes) + ":" + toPaddedString(2, seconds) +
                  // Milliseconds are optional in ES 5.0, but required in 5.1.
                  "." + toPaddedString(3, milliseconds) + "Z";
              } else {
                value = null;
              }
            } else if (typeof value.toJSON == "function" && ((className != numberClass && className != stringClass && className != arrayClass) || isProperty.call(value, "toJSON"))) {
              // Prototype <= 1.6.1 adds non-standard `toJSON` methods to the
              // `Number`, `String`, `Date`, and `Array` prototypes. JSON 3
              // ignores all `toJSON` methods on these objects unless they are
              // defined directly on an instance.
              value = value.toJSON(property);
            }
          }
          if (callback) {
            // If a replacement function was provided, call it to obtain the value
            // for serialization.
            value = callback.call(object, property, value);
          }
          if (value === null) {
            return "null";
          }
          className = getClass.call(value);
          if (className == booleanClass) {
            // Booleans are represented literally.
            return "" + value;
          } else if (className == numberClass) {
            // JSON numbers must be finite. `Infinity` and `NaN` are serialized as
            // `"null"`.
            return value > -1 / 0 && value < 1 / 0 ? "" + value : "null";
          } else if (className == stringClass) {
            // Strings are double-quoted and escaped.
            return quote("" + value);
          }
          // Recursively serialize objects and arrays.
          if (typeof value == "object") {
            // Check for cyclic structures. This is a linear search; performance
            // is inversely proportional to the number of unique nested objects.
            for (length = stack.length; length--;) {
              if (stack[length] === value) {
                // Cyclic structures cannot be serialized by `JSON.stringify`.
                throw TypeError();
              }
            }
            // Add the object to the stack of traversed objects.
            stack.push(value);
            results = [];
            // Save the current indentation level and indent one additional level.
            prefix = indentation;
            indentation += whitespace;
            if (className == arrayClass) {
              // Recursively serialize array elements.
              for (index = 0, length = value.length; index < length; index++) {
                element = serialize(index, value, callback, properties, whitespace, indentation, stack);
                results.push(element === undef ? "null" : element);
              }
              result = results.length ? (whitespace ? "[\n" + indentation + results.join(",\n" + indentation) + "\n" + prefix + "]" : ("[" + results.join(",") + "]")) : "[]";
            } else {
              // Recursively serialize object members. Members are selected from
              // either a user-specified list of property names, or the object
              // itself.
              forEach(properties || value, function (property) {
                var element = serialize(property, value, callback, properties, whitespace, indentation, stack);
                if (element !== undef) {
                  // According to ES 5.1 section 15.12.3: "If `gap` {whitespace}
                  // is not the empty string, let `member` {quote(property) + ":"}
                  // be the concatenation of `member` and the `space` character."
                  // The "`space` character" refers to the literal space
                  // character, not the `space` {width} argument provided to
                  // `JSON.stringify`.
                  results.push(quote(property) + ":" + (whitespace ? " " : "") + element);
                }
              });
              result = results.length ? (whitespace ? "{\n" + indentation + results.join(",\n" + indentation) + "\n" + prefix + "}" : ("{" + results.join(",") + "}")) : "{}";
            }
            // Remove the object from the traversed object stack.
            stack.pop();
            return result;
          }
        };

        // Public: `JSON.stringify`. See ES 5.1 section 15.12.3.
        exports.stringify = function (source, filter, width) {
          var whitespace, callback, properties, className;
          if (objectTypes[typeof filter] && filter) {
            if ((className = getClass.call(filter)) == functionClass) {
              callback = filter;
            } else if (className == arrayClass) {
              // Convert the property names array into a makeshift set.
              properties = {};
              for (var index = 0, length = filter.length, value; index < length; value = filter[index++], ((className = getClass.call(value)), className == stringClass || className == numberClass) && (properties[value] = 1));
            }
          }
          if (width) {
            if ((className = getClass.call(width)) == numberClass) {
              // Convert the `width` to an integer and create a string containing
              // `width` number of space characters.
              if ((width -= width % 1) > 0) {
                for (whitespace = "", width > 10 && (width = 10); whitespace.length < width; whitespace += " ");
              }
            } else if (className == stringClass) {
              whitespace = width.length <= 10 ? width : width.slice(0, 10);
            }
          }
          // Opera <= 7.54u2 discards the values associated with empty string keys
          // (`""`) only if they are used directly within an object member list
          // (e.g., `!("" in { "": 1})`).
          return serialize("", (value = {}, value[""] = source, value), callback, properties, whitespace, "", []);
        };
      }

      // Public: Parses a JSON source string.
      if (!has("json-parse")) {
        var fromCharCode = String.fromCharCode;

        // Internal: A map of escaped control characters and their unescaped
        // equivalents.
        var Unescapes = {
          92: "\\",
          34: '"',
          47: "/",
          98: "\b",
          116: "\t",
          110: "\n",
          102: "\f",
          114: "\r"
        };

        // Internal: Stores the parser state.
        var Index, Source;

        // Internal: Resets the parser state and throws a `SyntaxError`.
        var abort = function () {
          Index = Source = null;
          throw SyntaxError();
        };

        // Internal: Returns the next token, or `"$"` if the parser has reached
        // the end of the source string. A token may be a string, number, `null`
        // literal, or Boolean literal.
        var lex = function () {
          var source = Source, length = source.length, value, begin, position, isSigned, charCode;
          while (Index < length) {
            charCode = source.charCodeAt(Index);
            switch (charCode) {
              case 9: case 10: case 13: case 32:
                // Skip whitespace tokens, including tabs, carriage returns, line
                // feeds, and space characters.
                Index++;
                break;
              case 123: case 125: case 91: case 93: case 58: case 44:
                // Parse a punctuator token (`{`, `}`, `[`, `]`, `:`, or `,`) at
                // the current position.
                value = charIndexBuggy ? source.charAt(Index) : source[Index];
                Index++;
                return value;
              case 34:
                // `"` delimits a JSON string; advance to the next character and
                // begin parsing the string. String tokens are prefixed with the
                // sentinel `@` character to distinguish them from punctuators and
                // end-of-string tokens.
                for (value = "@", Index++; Index < length;) {
                  charCode = source.charCodeAt(Index);
                  if (charCode < 32) {
                    // Unescaped ASCII control characters (those with a code unit
                    // less than the space character) are not permitted.
                    abort();
                  } else if (charCode == 92) {
                    // A reverse solidus (`\`) marks the beginning of an escaped
                    // control character (including `"`, `\`, and `/`) or Unicode
                    // escape sequence.
                    charCode = source.charCodeAt(++Index);
                    switch (charCode) {
                      case 92: case 34: case 47: case 98: case 116: case 110: case 102: case 114:
                        // Revive escaped control characters.
                        value += Unescapes[charCode];
                        Index++;
                        break;
                      case 117:
                        // `\u` marks the beginning of a Unicode escape sequence.
                        // Advance to the first character and validate the
                        // four-digit code point.
                        begin = ++Index;
                        for (position = Index + 4; Index < position; Index++) {
                          charCode = source.charCodeAt(Index);
                          // A valid sequence comprises four hexdigits (case-
                          // insensitive) that form a single hexadecimal value.
                          if (!(charCode >= 48 && charCode <= 57 || charCode >= 97 && charCode <= 102 || charCode >= 65 && charCode <= 70)) {
                            // Invalid Unicode escape sequence.
                            abort();
                          }
                        }
                        // Revive the escaped character.
                        value += fromCharCode("0x" + source.slice(begin, Index));
                        break;
                      default:
                        // Invalid escape sequence.
                        abort();
                    }
                  } else {
                    if (charCode == 34) {
                      // An unescaped double-quote character marks the end of the
                      // string.
                      break;
                    }
                    charCode = source.charCodeAt(Index);
                    begin = Index;
                    // Optimize for the common case where a string is valid.
                    while (charCode >= 32 && charCode != 92 && charCode != 34) {
                      charCode = source.charCodeAt(++Index);
                    }
                    // Append the string as-is.
                    value += source.slice(begin, Index);
                  }
                }
                if (source.charCodeAt(Index) == 34) {
                  // Advance to the next character and return the revived string.
                  Index++;
                  return value;
                }
                // Unterminated string.
                abort();
              default:
                // Parse numbers and literals.
                begin = Index;
                // Advance past the negative sign, if one is specified.
                if (charCode == 45) {
                  isSigned = true;
                  charCode = source.charCodeAt(++Index);
                }
                // Parse an integer or floating-point value.
                if (charCode >= 48 && charCode <= 57) {
                  // Leading zeroes are interpreted as octal literals.
                  if (charCode == 48 && ((charCode = source.charCodeAt(Index + 1)), charCode >= 48 && charCode <= 57)) {
                    // Illegal octal literal.
                    abort();
                  }
                  isSigned = false;
                  // Parse the integer component.
                  for (; Index < length && ((charCode = source.charCodeAt(Index)), charCode >= 48 && charCode <= 57); Index++);
                  // Floats cannot contain a leading decimal point; however, this
                  // case is already accounted for by the parser.
                  if (source.charCodeAt(Index) == 46) {
                    position = ++Index;
                    // Parse the decimal component.
                    for (; position < length && ((charCode = source.charCodeAt(position)), charCode >= 48 && charCode <= 57); position++);
                    if (position == Index) {
                      // Illegal trailing decimal.
                      abort();
                    }
                    Index = position;
                  }
                  // Parse exponents. The `e` denoting the exponent is
                  // case-insensitive.
                  charCode = source.charCodeAt(Index);
                  if (charCode == 101 || charCode == 69) {
                    charCode = source.charCodeAt(++Index);
                    // Skip past the sign following the exponent, if one is
                    // specified.
                    if (charCode == 43 || charCode == 45) {
                      Index++;
                    }
                    // Parse the exponential component.
                    for (position = Index; position < length && ((charCode = source.charCodeAt(position)), charCode >= 48 && charCode <= 57); position++);
                    if (position == Index) {
                      // Illegal empty exponent.
                      abort();
                    }
                    Index = position;
                  }
                  // Coerce the parsed value to a JavaScript number.
                  return +source.slice(begin, Index);
                }
                // A negative sign may only precede numbers.
                if (isSigned) {
                  abort();
                }
                // `true`, `false`, and `null` literals.
                if (source.slice(Index, Index + 4) == "true") {
                  Index += 4;
                  return true;
                } else if (source.slice(Index, Index + 5) == "false") {
                  Index += 5;
                  return false;
                } else if (source.slice(Index, Index + 4) == "null") {
                  Index += 4;
                  return null;
                }
                // Unrecognized token.
                abort();
            }
          }
          // Return the sentinel `$` character if the parser has reached the end
          // of the source string.
          return "$";
        };

        // Internal: Parses a JSON `value` token.
        var get = function (value) {
          var results, hasMembers;
          if (value == "$") {
            // Unexpected end of input.
            abort();
          }
          if (typeof value == "string") {
            if ((charIndexBuggy ? value.charAt(0) : value[0]) == "@") {
              // Remove the sentinel `@` character.
              return value.slice(1);
            }
            // Parse object and array literals.
            if (value == "[") {
              // Parses a JSON array, returning a new JavaScript array.
              results = [];
              for (;; hasMembers || (hasMembers = true)) {
                value = lex();
                // A closing square bracket marks the end of the array literal.
                if (value == "]") {
                  break;
                }
                // If the array literal contains elements, the current token
                // should be a comma separating the previous element from the
                // next.
                if (hasMembers) {
                  if (value == ",") {
                    value = lex();
                    if (value == "]") {
                      // Unexpected trailing `,` in array literal.
                      abort();
                    }
                  } else {
                    // A `,` must separate each array element.
                    abort();
                  }
                }
                // Elisions and leading commas are not permitted.
                if (value == ",") {
                  abort();
                }
                results.push(get(value));
              }
              return results;
            } else if (value == "{") {
              // Parses a JSON object, returning a new JavaScript object.
              results = {};
              for (;; hasMembers || (hasMembers = true)) {
                value = lex();
                // A closing curly brace marks the end of the object literal.
                if (value == "}") {
                  break;
                }
                // If the object literal contains members, the current token
                // should be a comma separator.
                if (hasMembers) {
                  if (value == ",") {
                    value = lex();
                    if (value == "}") {
                      // Unexpected trailing `,` in object literal.
                      abort();
                    }
                  } else {
                    // A `,` must separate each object member.
                    abort();
                  }
                }
                // Leading commas are not permitted, object property names must be
                // double-quoted strings, and a `:` must separate each property
                // name and value.
                if (value == "," || typeof value != "string" || (charIndexBuggy ? value.charAt(0) : value[0]) != "@" || lex() != ":") {
                  abort();
                }
                results[value.slice(1)] = get(lex());
              }
              return results;
            }
            // Unexpected token encountered.
            abort();
          }
          return value;
        };

        // Internal: Updates a traversed object member.
        var update = function (source, property, callback) {
          var element = walk(source, property, callback);
          if (element === undef) {
            delete source[property];
          } else {
            source[property] = element;
          }
        };

        // Internal: Recursively traverses a parsed JSON object, invoking the
        // `callback` function for each value. This is an implementation of the
        // `Walk(holder, name)` operation defined in ES 5.1 section 15.12.2.
        var walk = function (source, property, callback) {
          var value = source[property], length;
          if (typeof value == "object" && value) {
            // `forEach` can't be used to traverse an array in Opera <= 8.54
            // because its `Object#hasOwnProperty` implementation returns `false`
            // for array indices (e.g., `![1, 2, 3].hasOwnProperty("0")`).
            if (getClass.call(value) == arrayClass) {
              for (length = value.length; length--;) {
                update(value, length, callback);
              }
            } else {
              forEach(value, function (property) {
                update(value, property, callback);
              });
            }
          }
          return callback.call(source, property, value);
        };

        // Public: `JSON.parse`. See ES 5.1 section 15.12.2.
        exports.parse = function (source, callback) {
          var result, value;
          Index = 0;
          Source = "" + source;
          result = get(lex());
          // If a JSON string contains multiple tokens, it is invalid.
          if (lex() != "$") {
            abort();
          }
          // Reset the parser state.
          Index = Source = null;
          return callback && getClass.call(callback) == functionClass ? walk((value = {}, value[""] = result, value), "", callback) : result;
        };
      }
    }

    exports["runInContext"] = runInContext;
    return exports;
  }

  if (freeExports && !isLoader) {
    // Export for CommonJS environments.
    runInContext(root, freeExports);
  } else {
    // Export for web browsers and JavaScript engines.
    var nativeJSON = root.JSON,
        previousJSON = root["JSON3"],
        isRestored = false;

    var JSON3 = runInContext(root, (root["JSON3"] = {
      // Public: Restores the original value of the global `JSON` object and
      // returns a reference to the `JSON3` object.
      "noConflict": function () {
        if (!isRestored) {
          isRestored = true;
          root.JSON = nativeJSON;
          root["JSON3"] = previousJSON;
          nativeJSON = previousJSON = null;
        }
        return JSON3;
      }
    }));

    root.JSON = {
      "parse": JSON3.parse,
      "stringify": JSON3.stringify
    };
  }

  // Export for asynchronous module loaders.
  if (isLoader) {
    undefined(function () {
      return JSON3;
    });
  }
}).call(commonjsGlobal);
});

var constants = {
  DEFAULT_INSTANCE: '$default_instance',
  API_VERSION: 2,
  MAX_STRING_LENGTH: 4096,
  MAX_PROPERTY_KEYS: 1000,
  IDENTIFY_EVENT: '$identify',
  GROUP_IDENTIFY_EVENT: '$groupidentify',

  // localStorageKeys
  LAST_EVENT_ID: 'amplitude_lastEventId',
  LAST_EVENT_TIME: 'amplitude_lastEventTime',
  LAST_IDENTIFY_ID: 'amplitude_lastIdentifyId',
  LAST_SEQUENCE_NUMBER: 'amplitude_lastSequenceNumber',
  SESSION_ID: 'amplitude_sessionId',

  // Used in cookie as well
  DEVICE_ID: 'amplitude_deviceId',
  OPT_OUT: 'amplitude_optOut',
  USER_ID: 'amplitude_userId',

  COOKIE_TEST: 'amplitude_cookie_test',

  // revenue keys
  REVENUE_EVENT: 'revenue_amount',
  REVENUE_PRODUCT_ID: '$productId',
  REVENUE_QUANTITY: '$quantity',
  REVENUE_PRICE: '$price',
  REVENUE_REVENUE_TYPE: '$revenueType',

  AMP_DEVICE_ID_PARAM: 'amp_device_id' // url param
};

/* jshint bitwise: false */

/*
 * UTF-8 encoder/decoder
 * http://www.webtoolkit.info/
 */
var UTF8 = {
    encode: function encode(s) {
        var utftext = '';

        for (var n = 0; n < s.length; n++) {
            var c = s.charCodeAt(n);

            if (c < 128) {
                utftext += String.fromCharCode(c);
            } else if (c > 127 && c < 2048) {
                utftext += String.fromCharCode(c >> 6 | 192);
                utftext += String.fromCharCode(c & 63 | 128);
            } else {
                utftext += String.fromCharCode(c >> 12 | 224);
                utftext += String.fromCharCode(c >> 6 & 63 | 128);
                utftext += String.fromCharCode(c & 63 | 128);
            }
        }
        return utftext;
    },

    decode: function decode(utftext) {
        var s = '';
        var i = 0;
        var c = 0,
            c1 = 0,
            c2 = 0;

        while (i < utftext.length) {
            c = utftext.charCodeAt(i);
            if (c < 128) {
                s += String.fromCharCode(c);
                i++;
            } else if (c > 191 && c < 224) {
                c1 = utftext.charCodeAt(i + 1);
                s += String.fromCharCode((c & 31) << 6 | c1 & 63);
                i += 2;
            } else {
                c1 = utftext.charCodeAt(i + 1);
                c2 = utftext.charCodeAt(i + 2);
                s += String.fromCharCode((c & 15) << 12 | (c1 & 63) << 6 | c2 & 63);
                i += 3;
            }
        }
        return s;
    }
};

/* jshint bitwise: false */
/* global escape, unescape */

/*
 * Base64 encoder/decoder
 * http://www.webtoolkit.info/
 */
var Base64 = {
    _keyStr: 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=',

    encode: function encode(input) {
        try {
            if (window.btoa && window.atob) {
                return window.btoa(unescape(encodeURIComponent(input)));
            }
        } catch (e) {
            //log(e);
        }
        return Base64._encode(input);
    },

    _encode: function _encode(input) {
        var output = '';
        var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
        var i = 0;

        input = UTF8.encode(input);

        while (i < input.length) {
            chr1 = input.charCodeAt(i++);
            chr2 = input.charCodeAt(i++);
            chr3 = input.charCodeAt(i++);

            enc1 = chr1 >> 2;
            enc2 = (chr1 & 3) << 4 | chr2 >> 4;
            enc3 = (chr2 & 15) << 2 | chr3 >> 6;
            enc4 = chr3 & 63;

            if (isNaN(chr2)) {
                enc3 = enc4 = 64;
            } else if (isNaN(chr3)) {
                enc4 = 64;
            }

            output = output + Base64._keyStr.charAt(enc1) + Base64._keyStr.charAt(enc2) + Base64._keyStr.charAt(enc3) + Base64._keyStr.charAt(enc4);
        }
        return output;
    },

    decode: function decode(input) {
        try {
            if (window.btoa && window.atob) {
                return decodeURIComponent(escape(window.atob(input)));
            }
        } catch (e) {
            //log(e);
        }
        return Base64._decode(input);
    },

    _decode: function _decode(input) {
        var output = '';
        var chr1, chr2, chr3;
        var enc1, enc2, enc3, enc4;
        var i = 0;

        input = input.replace(/[^A-Za-z0-9\+\/\=]/g, '');

        while (i < input.length) {
            enc1 = Base64._keyStr.indexOf(input.charAt(i++));
            enc2 = Base64._keyStr.indexOf(input.charAt(i++));
            enc3 = Base64._keyStr.indexOf(input.charAt(i++));
            enc4 = Base64._keyStr.indexOf(input.charAt(i++));

            chr1 = enc1 << 2 | enc2 >> 4;
            chr2 = (enc2 & 15) << 4 | enc3 >> 2;
            chr3 = (enc3 & 3) << 6 | enc4;

            output = output + String.fromCharCode(chr1);

            if (enc3 !== 64) {
                output = output + String.fromCharCode(chr2);
            }
            if (enc4 !== 64) {
                output = output + String.fromCharCode(chr3);
            }
        }
        output = UTF8.decode(output);
        return output;
    }
};

var componentUrl = createCommonjsModule(function (module, exports) {
/**
 * Parse the given `url`.
 *
 * @param {String} str
 * @return {Object}
 * @api public
 */

exports.parse = function(url){
  var a = document.createElement('a');
  a.href = url;
  return {
    href: a.href,
    host: a.host || location.host,
    port: ('0' === a.port || '' === a.port) ? port(a.protocol) : a.port,
    hash: a.hash,
    hostname: a.hostname || location.hostname,
    pathname: a.pathname.charAt(0) != '/' ? '/' + a.pathname : a.pathname,
    protocol: !a.protocol || ':' == a.protocol ? location.protocol : a.protocol,
    search: a.search,
    query: a.search.slice(1)
  };
};

/**
 * Check if `url` is absolute.
 *
 * @param {String} url
 * @return {Boolean}
 * @api public
 */

exports.isAbsolute = function(url){
  return 0 == url.indexOf('//') || !!~url.indexOf('://');
};

/**
 * Check if `url` is relative.
 *
 * @param {String} url
 * @return {Boolean}
 * @api public
 */

exports.isRelative = function(url){
  return !exports.isAbsolute(url);
};

/**
 * Check if `url` is cross domain.
 *
 * @param {String} url
 * @return {Boolean}
 * @api public
 */

exports.isCrossDomain = function(url){
  url = exports.parse(url);
  var location = exports.parse(window.location.href);
  return url.hostname !== location.hostname
    || url.port !== location.port
    || url.protocol !== location.protocol;
};

/**
 * Return default port for `protocol`.
 *
 * @param  {String} protocol
 * @return {String}
 * @api private
 */
function port (protocol){
  switch (protocol) {
    case 'http:':
      return 80;
    case 'https:':
      return 443;
    default:
      return location.port;
  }
}
});

/**
 * Helpers.
 */

var s = 1000;
var m = s * 60;
var h = m * 60;
var d = h * 24;
var y = d * 365.25;

/**
 * Parse or format the given `val`.
 *
 * Options:
 *
 *  - `long` verbose formatting [false]
 *
 * @param {String|Number} val
 * @param {Object} [options]
 * @throws {Error} throw an error if val is not a non-empty string or a number
 * @return {String|Number}
 * @api public
 */

var ms = function(val, options) {
  options = options || {};
  var type = typeof val;
  if (type === 'string' && val.length > 0) {
    return parse$1(val);
  } else if (type === 'number' && isNaN(val) === false) {
    return options.long ? fmtLong(val) : fmtShort(val);
  }
  throw new Error(
    'val is not a non-empty string or a valid number. val=' +
      JSON.stringify(val)
  );
};

/**
 * Parse the given `str` and return milliseconds.
 *
 * @param {String} str
 * @return {Number}
 * @api private
 */

function parse$1(str) {
  str = String(str);
  if (str.length > 100) {
    return;
  }
  var match = /^((?:\d+)?\.?\d+) *(milliseconds?|msecs?|ms|seconds?|secs?|s|minutes?|mins?|m|hours?|hrs?|h|days?|d|years?|yrs?|y)?$/i.exec(
    str
  );
  if (!match) {
    return;
  }
  var n = parseFloat(match[1]);
  var type = (match[2] || 'ms').toLowerCase();
  switch (type) {
    case 'years':
    case 'year':
    case 'yrs':
    case 'yr':
    case 'y':
      return n * y;
    case 'days':
    case 'day':
    case 'd':
      return n * d;
    case 'hours':
    case 'hour':
    case 'hrs':
    case 'hr':
    case 'h':
      return n * h;
    case 'minutes':
    case 'minute':
    case 'mins':
    case 'min':
    case 'm':
      return n * m;
    case 'seconds':
    case 'second':
    case 'secs':
    case 'sec':
    case 's':
      return n * s;
    case 'milliseconds':
    case 'millisecond':
    case 'msecs':
    case 'msec':
    case 'ms':
      return n;
    default:
      return undefined;
  }
}

/**
 * Short format for `ms`.
 *
 * @param {Number} ms
 * @return {String}
 * @api private
 */

function fmtShort(ms) {
  if (ms >= d) {
    return Math.round(ms / d) + 'd';
  }
  if (ms >= h) {
    return Math.round(ms / h) + 'h';
  }
  if (ms >= m) {
    return Math.round(ms / m) + 'm';
  }
  if (ms >= s) {
    return Math.round(ms / s) + 's';
  }
  return ms + 'ms';
}

/**
 * Long format for `ms`.
 *
 * @param {Number} ms
 * @return {String}
 * @api private
 */

function fmtLong(ms) {
  return plural(ms, d, 'day') ||
    plural(ms, h, 'hour') ||
    plural(ms, m, 'minute') ||
    plural(ms, s, 'second') ||
    ms + ' ms';
}

/**
 * Pluralization helper.
 */

function plural(ms, n, name) {
  if (ms < n) {
    return;
  }
  if (ms < n * 1.5) {
    return Math.floor(ms / n) + ' ' + name;
  }
  return Math.ceil(ms / n) + ' ' + name + 's';
}

var debug$1 = createCommonjsModule(function (module, exports) {
/**
 * This is the common logic for both the Node.js and web browser
 * implementations of `debug()`.
 *
 * Expose `debug()` as the module.
 */

exports = module.exports = createDebug.debug = createDebug['default'] = createDebug;
exports.coerce = coerce;
exports.disable = disable;
exports.enable = enable;
exports.enabled = enabled;
exports.humanize = ms;

/**
 * Active `debug` instances.
 */
exports.instances = [];

/**
 * The currently active debug mode names, and names to skip.
 */

exports.names = [];
exports.skips = [];

/**
 * Map of special "%n" handling functions, for the debug "format" argument.
 *
 * Valid key names are a single, lower or upper-case letter, i.e. "n" and "N".
 */

exports.formatters = {};

/**
 * Select a color.
 * @param {String} namespace
 * @return {Number}
 * @api private
 */

function selectColor(namespace) {
  var hash = 0, i;

  for (i in namespace) {
    hash  = ((hash << 5) - hash) + namespace.charCodeAt(i);
    hash |= 0; // Convert to 32bit integer
  }

  return exports.colors[Math.abs(hash) % exports.colors.length];
}

/**
 * Create a debugger with the given `namespace`.
 *
 * @param {String} namespace
 * @return {Function}
 * @api public
 */

function createDebug(namespace) {

  var prevTime;

  function debug() {
    // disabled?
    if (!debug.enabled) return;

    var self = debug;

    // set `diff` timestamp
    var curr = +new Date();
    var ms$$1 = curr - (prevTime || curr);
    self.diff = ms$$1;
    self.prev = prevTime;
    self.curr = curr;
    prevTime = curr;

    // turn the `arguments` into a proper Array
    var args = new Array(arguments.length);
    for (var i = 0; i < args.length; i++) {
      args[i] = arguments[i];
    }

    args[0] = exports.coerce(args[0]);

    if ('string' !== typeof args[0]) {
      // anything else let's inspect with %O
      args.unshift('%O');
    }

    // apply any `formatters` transformations
    var index = 0;
    args[0] = args[0].replace(/%([a-zA-Z%])/g, function(match, format) {
      // if we encounter an escaped % then don't increase the array index
      if (match === '%%') return match;
      index++;
      var formatter = exports.formatters[format];
      if ('function' === typeof formatter) {
        var val = args[index];
        match = formatter.call(self, val);

        // now we need to remove `args[index]` since it's inlined in the `format`
        args.splice(index, 1);
        index--;
      }
      return match;
    });

    // apply env-specific formatting (colors, etc.)
    exports.formatArgs.call(self, args);

    var logFn = debug.log || exports.log || console.log.bind(console);
    logFn.apply(self, args);
  }

  debug.namespace = namespace;
  debug.enabled = exports.enabled(namespace);
  debug.useColors = exports.useColors();
  debug.color = selectColor(namespace);
  debug.destroy = destroy;

  // env-specific initialization logic for debug instances
  if ('function' === typeof exports.init) {
    exports.init(debug);
  }

  exports.instances.push(debug);

  return debug;
}

function destroy () {
  var index = exports.instances.indexOf(this);
  if (index !== -1) {
    exports.instances.splice(index, 1);
    return true;
  } else {
    return false;
  }
}

/**
 * Enables a debug mode by namespaces. This can include modes
 * separated by a colon and wildcards.
 *
 * @param {String} namespaces
 * @api public
 */

function enable(namespaces) {
  exports.save(namespaces);

  exports.names = [];
  exports.skips = [];

  var i;
  var split = (typeof namespaces === 'string' ? namespaces : '').split(/[\s,]+/);
  var len = split.length;

  for (i = 0; i < len; i++) {
    if (!split[i]) continue; // ignore empty strings
    namespaces = split[i].replace(/\*/g, '.*?');
    if (namespaces[0] === '-') {
      exports.skips.push(new RegExp('^' + namespaces.substr(1) + '$'));
    } else {
      exports.names.push(new RegExp('^' + namespaces + '$'));
    }
  }

  for (i = 0; i < exports.instances.length; i++) {
    var instance = exports.instances[i];
    instance.enabled = exports.enabled(instance.namespace);
  }
}

/**
 * Disable debug output.
 *
 * @api public
 */

function disable() {
  exports.enable('');
}

/**
 * Returns true if the given mode name is enabled, false otherwise.
 *
 * @param {String} name
 * @return {Boolean}
 * @api public
 */

function enabled(name) {
  if (name[name.length - 1] === '*') {
    return true;
  }
  var i, len;
  for (i = 0, len = exports.skips.length; i < len; i++) {
    if (exports.skips[i].test(name)) {
      return false;
    }
  }
  for (i = 0, len = exports.names.length; i < len; i++) {
    if (exports.names[i].test(name)) {
      return true;
    }
  }
  return false;
}

/**
 * Coerce `val`.
 *
 * @param {Mixed} val
 * @return {Mixed}
 * @api private
 */

function coerce(val) {
  if (val instanceof Error) return val.stack || val.message;
  return val;
}
});

var browser = createCommonjsModule(function (module, exports) {
/**
 * This is the web browser implementation of `debug()`.
 *
 * Expose `debug()` as the module.
 */

exports = module.exports = debug$1;
exports.log = log;
exports.formatArgs = formatArgs;
exports.save = save;
exports.load = load;
exports.useColors = useColors;
exports.storage = 'undefined' != typeof chrome
               && 'undefined' != typeof chrome.storage
                  ? chrome.storage.local
                  : localstorage();

/**
 * Colors.
 */

exports.colors = [
  '#0000CC', '#0000FF', '#0033CC', '#0033FF', '#0066CC', '#0066FF', '#0099CC',
  '#0099FF', '#00CC00', '#00CC33', '#00CC66', '#00CC99', '#00CCCC', '#00CCFF',
  '#3300CC', '#3300FF', '#3333CC', '#3333FF', '#3366CC', '#3366FF', '#3399CC',
  '#3399FF', '#33CC00', '#33CC33', '#33CC66', '#33CC99', '#33CCCC', '#33CCFF',
  '#6600CC', '#6600FF', '#6633CC', '#6633FF', '#66CC00', '#66CC33', '#9900CC',
  '#9900FF', '#9933CC', '#9933FF', '#99CC00', '#99CC33', '#CC0000', '#CC0033',
  '#CC0066', '#CC0099', '#CC00CC', '#CC00FF', '#CC3300', '#CC3333', '#CC3366',
  '#CC3399', '#CC33CC', '#CC33FF', '#CC6600', '#CC6633', '#CC9900', '#CC9933',
  '#CCCC00', '#CCCC33', '#FF0000', '#FF0033', '#FF0066', '#FF0099', '#FF00CC',
  '#FF00FF', '#FF3300', '#FF3333', '#FF3366', '#FF3399', '#FF33CC', '#FF33FF',
  '#FF6600', '#FF6633', '#FF9900', '#FF9933', '#FFCC00', '#FFCC33'
];

/**
 * Currently only WebKit-based Web Inspectors, Firefox >= v31,
 * and the Firebug extension (any Firefox version) are known
 * to support "%c" CSS customizations.
 *
 * TODO: add a `localStorage` variable to explicitly enable/disable colors
 */

function useColors() {
  // NB: In an Electron preload script, document will be defined but not fully
  // initialized. Since we know we're in Chrome, we'll just detect this case
  // explicitly
  if (typeof window !== 'undefined' && window.process && window.process.type === 'renderer') {
    return true;
  }

  // Internet Explorer and Edge do not support colors.
  if (typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/(edge|trident)\/(\d+)/)) {
    return false;
  }

  // is webkit? http://stackoverflow.com/a/16459606/376773
  // document is undefined in react-native: https://github.com/facebook/react-native/pull/1632
  return (typeof document !== 'undefined' && document.documentElement && document.documentElement.style && document.documentElement.style.WebkitAppearance) ||
    // is firebug? http://stackoverflow.com/a/398120/376773
    (typeof window !== 'undefined' && window.console && (window.console.firebug || (window.console.exception && window.console.table))) ||
    // is firefox >= v31?
    // https://developer.mozilla.org/en-US/docs/Tools/Web_Console#Styling_messages
    (typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/firefox\/(\d+)/) && parseInt(RegExp.$1, 10) >= 31) ||
    // double check webkit in userAgent just in case we are in a worker
    (typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/applewebkit\/(\d+)/));
}

/**
 * Map %j to `JSON.stringify()`, since no Web Inspectors do that by default.
 */

exports.formatters.j = function(v) {
  try {
    return JSON.stringify(v);
  } catch (err) {
    return '[UnexpectedJSONParseError]: ' + err.message;
  }
};


/**
 * Colorize log arguments if enabled.
 *
 * @api public
 */

function formatArgs(args) {
  var useColors = this.useColors;

  args[0] = (useColors ? '%c' : '')
    + this.namespace
    + (useColors ? ' %c' : ' ')
    + args[0]
    + (useColors ? '%c ' : ' ')
    + '+' + exports.humanize(this.diff);

  if (!useColors) return;

  var c = 'color: ' + this.color;
  args.splice(1, 0, c, 'color: inherit');

  // the final "%c" is somewhat tricky, because there could be other
  // arguments passed either before or after the %c, so we need to
  // figure out the correct index to insert the CSS into
  var index = 0;
  var lastC = 0;
  args[0].replace(/%[a-zA-Z%]/g, function(match) {
    if ('%%' === match) return;
    index++;
    if ('%c' === match) {
      // we only are interested in the *last* %c
      // (the user may have provided their own)
      lastC = index;
    }
  });

  args.splice(lastC, 0, c);
}

/**
 * Invokes `console.log()` when available.
 * No-op when `console.log` is not a "function".
 *
 * @api public
 */

function log() {
  // this hackery is required for IE8/9, where
  // the `console.log` function doesn't have 'apply'
  return 'object' === typeof console
    && console.log
    && Function.prototype.apply.call(console.log, console, arguments);
}

/**
 * Save `namespaces`.
 *
 * @param {String} namespaces
 * @api private
 */

function save(namespaces) {
  try {
    if (null == namespaces) {
      exports.storage.removeItem('debug');
    } else {
      exports.storage.debug = namespaces;
    }
  } catch(e) {}
}

/**
 * Load `namespaces`.
 *
 * @return {String} returns the previously persisted debug modes
 * @api private
 */

function load() {
  var r;
  try {
    r = exports.storage.debug;
  } catch(e) {}

  // If debug isn't set in LS, and we're in Electron, try to load $DEBUG
  if (!r && typeof process !== 'undefined' && 'env' in process) {
    r = process.env.DEBUG;
  }

  return r;
}

/**
 * Enable namespaces listed in `localStorage.debug` initially.
 */

exports.enable(load());

/**
 * Localstorage attempts to return the localstorage.
 *
 * This is necessary because safari throws
 * when a user disables cookies/localstorage
 * and you attempt to access it.
 *
 * @return {LocalStorage}
 * @api private
 */

function localstorage() {
  try {
    return window.localStorage;
  } catch (e) {}
}
});

/**
 * Module dependencies.
 */

var debug = browser('cookie');

/**
 * Set or get cookie `name` with `value` and `options` object.
 *
 * @param {String} name
 * @param {String} value
 * @param {Object} options
 * @return {Mixed}
 * @api public
 */

var componentCookie = function(name, value, options){
  switch (arguments.length) {
    case 3:
    case 2:
      return set$1(name, value, options);
    case 1:
      return get$1(name);
    default:
      return all();
  }
};

/**
 * Set cookie `name` to `value`.
 *
 * @param {String} name
 * @param {String} value
 * @param {Object} options
 * @api private
 */

function set$1(name, value, options) {
  options = options || {};
  var str = encode(name) + '=' + encode(value);

  if (null == value) options.maxage = -1;

  if (options.maxage) {
    options.expires = new Date(+new Date + options.maxage);
  }

  if (options.path) str += '; path=' + options.path;
  if (options.domain) str += '; domain=' + options.domain;
  if (options.expires) str += '; expires=' + options.expires.toUTCString();
  if (options.secure) str += '; secure';

  document.cookie = str;
}

/**
 * Return all cookies.
 *
 * @return {Object}
 * @api private
 */

function all() {
  var str;
  try {
    str = document.cookie;
  } catch (err) {
    if (typeof console !== 'undefined' && typeof console.error === 'function') {
      console.error(err.stack || err);
    }
    return {};
  }
  return parse(str);
}

/**
 * Get cookie `name`.
 *
 * @param {String} name
 * @return {String}
 * @api private
 */

function get$1(name) {
  return all()[name];
}

/**
 * Parse cookie `str`.
 *
 * @param {String} str
 * @return {Object}
 * @api private
 */

function parse(str) {
  var obj = {};
  var pairs = str.split(/ *; */);
  var pair;
  if ('' == pairs[0]) return obj;
  for (var i = 0; i < pairs.length; ++i) {
    pair = pairs[i].split('=');
    obj[decode(pair[0])] = decode(pair[1]);
  }
  return obj;
}

/**
 * Encode.
 */

function encode(value){
  try {
    return encodeURIComponent(value);
  } catch (e) {
    debug('error `encode(%o)` - %o', value, e);
  }
}

/**
 * Decode.
 */

function decode(value) {
  try {
    return decodeURIComponent(value);
  } catch (e) {
    debug('error `decode(%o)` - %o', value, e);
  }
}

var lib = createCommonjsModule(function (module, exports) {
'use strict';

/**
 * Module dependencies.
 */

var parse = componentUrl.parse;


/**
 * Get the top domain.
 *
 * The function constructs the levels of domain and attempts to set a global
 * cookie on each one when it succeeds it returns the top level domain.
 *
 * The method returns an empty string when the hostname is an ip or `localhost`.
 *
 * Example levels:
 *
 *      domain.levels('http://www.google.co.uk');
 *      // => ["co.uk", "google.co.uk", "www.google.co.uk"]
 *
 * Example:
 *
 *      domain('http://localhost:3000/baz');
 *      // => ''
 *      domain('http://dev:3000/baz');
 *      // => ''
 *      domain('http://127.0.0.1:3000/baz');
 *      // => ''
 *      domain('http://segment.io/baz');
 *      // => 'segment.io'
 *
 * @param {string} url
 * @return {string}
 * @api public
 */
function domain(url) {
  var cookie$$1 = exports.cookie;
  var levels = exports.levels(url);

  // Lookup the real top level one.
  for (var i = 0; i < levels.length; ++i) {
    var cname = '__tld__';
    var domain = levels[i];
    var opts = { domain: '.' + domain };

    cookie$$1(cname, 1, opts);
    if (cookie$$1(cname)) {
      cookie$$1(cname, null, opts);
      return domain;
    }
  }

  return '';
}

/**
 * Levels returns all levels of the given url.
 *
 * @param {string} url
 * @return {Array}
 * @api public
 */
domain.levels = function(url) {
  var host = parse(url).hostname;
  var parts = host.split('.');
  var last = parts[parts.length - 1];
  var levels = [];

  // Ip address.
  if (parts.length === 4 && last === parseInt(last, 10)) {
    return levels;
  }

  // Localhost.
  if (parts.length <= 1) {
    return levels;
  }

  // Create levels.
  for (var i = parts.length - 2; i >= 0; --i) {
    levels.push(parts.slice(i).join('.'));
  }

  return levels;
};

/**
 * Expose cookie on domain.
 */
domain.cookie = componentCookie;

/*
 * Exports.
 */

exports = module.exports = domain;
});

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };

/**
 * toString ref.
 * @private
 */

var toString = Object.prototype.toString;

/**
 * Return the type of `val`.
 * @private
 * @param {Mixed} val
 * @return {String}
 * @api public
 */

var type = function (val) {
  switch (toString.call(val)) {
    case '[object Date]':
      return 'date';
    case '[object RegExp]':
      return 'regexp';
    case '[object Arguments]':
      return 'arguments';
    case '[object Array]':
      return 'array';
    case '[object Error]':
      return 'error';
  }

  if (val === null) {
    return 'null';
  }
  if (val === undefined) {
    return 'undefined';
  }
  if (val !== val) {
    return 'nan';
  }
  if (val && val.nodeType === 1) {
    return 'element';
  }

  if (typeof Buffer !== 'undefined' && Buffer.isBuffer(val)) {
    return 'buffer';
  }

  val = val.valueOf ? val.valueOf() : Object.prototype.valueOf.apply(val);
  return typeof val === 'undefined' ? 'undefined' : _typeof(val);
};

var logLevel = 'WARN';

var logLevels = {
  DISABLE: 0,
  ERROR: 1,
  WARN: 2,
  INFO: 3
};

var setLogLevel = function setLogLevel(logLevelName) {
  logLevel = logLevels[logLevelName] || logLevel;
};

var getLogLevel = function getLogLevel() {
  return logLevel;
};

var log = {
  error: function error(s) {
    if (logLevel >= logLevels.ERROR) {
      _log(s);
    }
  },

  warn: function warn(s) {
    if (logLevel >= logLevels.WARN) {
      _log(s);
    }
  },

  info: function info(s) {
    if (logLevel >= logLevels.INFO) {
      _log(s);
    }
  }
};

var _log = function _log(s) {
  try {
    console.log('[Amplitude] ' + s);
  } catch (e) {
    // console logging not available
  }
};

var isEmptyString = function isEmptyString(str) {
  return !str || str.length === 0;
};

var sessionStorageEnabled = function sessionStorageEnabled() {
  try {
    if (window.sessionStorage) {
      return true;
    }
  } catch (e) {} // sessionStorage disabled
  return false;
};

// truncate string values in event and user properties so that request size does not get too large
var truncate = function truncate(value) {
  if (type(value) === 'array') {
    for (var i = 0; i < value.length; i++) {
      value[i] = truncate(value[i]);
    }
  } else if (type(value) === 'object') {
    for (var key in value) {
      if (value.hasOwnProperty(key)) {
        value[key] = truncate(value[key]);
      }
    }
  } else {
    value = _truncateValue(value);
  }

  return value;
};

var _truncateValue = function _truncateValue(value) {
  if (type(value) === 'string') {
    return value.length > constants.MAX_STRING_LENGTH ? value.substring(0, constants.MAX_STRING_LENGTH) : value;
  }
  return value;
};

var validateInput = function validateInput(input, name, expectedType) {
  if (type(input) !== expectedType) {
    log.error('Invalid ' + name + ' input type. Expected ' + expectedType + ' but received ' + type(input));
    return false;
  }
  return true;
};

// do some basic sanitization and type checking, also catch property dicts with more than 1000 key/value pairs
var validateProperties = function validateProperties(properties) {
  var propsType = type(properties);
  if (propsType !== 'object') {
    log.error('Error: invalid properties format. Expecting Javascript object, received ' + propsType + ', ignoring');
    return {};
  }

  if (Object.keys(properties).length > constants.MAX_PROPERTY_KEYS) {
    log.error('Error: too many properties (more than 1000), ignoring');
    return {};
  }

  var copy = {}; // create a copy with all of the valid properties
  for (var property in properties) {
    if (!properties.hasOwnProperty(property)) {
      continue;
    }

    // validate key
    var key = property;
    var keyType = type(key);
    if (keyType !== 'string') {
      key = String(key);
      log.warn('WARNING: Non-string property key, received type ' + keyType + ', coercing to string "' + key + '"');
    }

    // validate value
    var value = validatePropertyValue(key, properties[property]);
    if (value === null) {
      continue;
    }
    copy[key] = value;
  }
  return copy;
};

var invalidValueTypes = ['null', 'nan', 'undefined', 'function', 'arguments', 'regexp', 'element'];

var validatePropertyValue = function validatePropertyValue(key, value) {
  var valueType = type(value);
  if (invalidValueTypes.indexOf(valueType) !== -1) {
    log.warn('WARNING: Property key "' + key + '" with invalid value type ' + valueType + ', ignoring');
    value = null;
  } else if (valueType === 'error') {
    value = String(value);
    log.warn('WARNING: Property key "' + key + '" with value type error, coercing to ' + value);
  } else if (valueType === 'array') {
    // check for nested arrays or objects
    var arrayCopy = [];
    for (var i = 0; i < value.length; i++) {
      var element = value[i];
      var elemType = type(element);
      if (elemType === 'array' || elemType === 'object') {
        log.warn('WARNING: Cannot have ' + elemType + ' nested in an array property value, skipping');
        continue;
      }
      arrayCopy.push(validatePropertyValue(key, element));
    }
    value = arrayCopy;
  } else if (valueType === 'object') {
    value = validateProperties(value);
  }
  return value;
};

var validateGroups = function validateGroups(groups) {
  var groupsType = type(groups);
  if (groupsType !== 'object') {
    log.error('Error: invalid groups format. Expecting Javascript object, received ' + groupsType + ', ignoring');
    return {};
  }

  var copy = {}; // create a copy with all of the valid properties
  for (var group in groups) {
    if (!groups.hasOwnProperty(group)) {
      continue;
    }

    // validate key
    var key = group;
    var keyType = type(key);
    if (keyType !== 'string') {
      key = String(key);
      log.warn('WARNING: Non-string groupType, received type ' + keyType + ', coercing to string "' + key + '"');
    }

    // validate value
    var value = validateGroupName(key, groups[group]);
    if (value === null) {
      continue;
    }
    copy[key] = value;
  }
  return copy;
};

var validateGroupName = function validateGroupName(key, groupName) {
  var groupNameType = type(groupName);
  if (groupNameType === 'string') {
    return groupName;
  }
  if (groupNameType === 'date' || groupNameType === 'number' || groupNameType === 'boolean') {
    groupName = String(groupName);
    log.warn('WARNING: Non-string groupName, received type ' + groupNameType + ', coercing to string "' + groupName + '"');
    return groupName;
  }
  if (groupNameType === 'array') {
    // check for nested arrays or objects
    var arrayCopy = [];
    for (var i = 0; i < groupName.length; i++) {
      var element = groupName[i];
      var elemType = type(element);
      if (elemType === 'array' || elemType === 'object') {
        log.warn('WARNING: Skipping nested ' + elemType + ' in array groupName');
        continue;
      } else if (elemType === 'string') {
        arrayCopy.push(element);
      } else if (elemType === 'date' || elemType === 'number' || elemType === 'boolean') {
        element = String(element);
        log.warn('WARNING: Non-string groupName, received type ' + elemType + ', coercing to string "' + element + '"');
        arrayCopy.push(element);
      }
    }
    return arrayCopy;
  }
  log.warn('WARNING: Non-string groupName, received type ' + groupNameType + '. Please use strings or array of strings for groupName');
};

// parses the value of a url param (for example ?gclid=1234&...)
var getQueryParam = function getQueryParam(name, query) {
  name = name.replace(/[\[]/, "\\[").replace(/[\]]/, "\\]");
  var regex = new RegExp("[\\?&]" + name + "=([^&#]*)");
  var results = regex.exec(query);
  return results === null ? undefined : decodeURIComponent(results[1].replace(/\+/g, " "));
};

var utils = {
  setLogLevel: setLogLevel,
  getLogLevel: getLogLevel,
  log: log,
  isEmptyString: isEmptyString,
  getQueryParam: getQueryParam,
  sessionStorageEnabled: sessionStorageEnabled,
  truncate: truncate,
  validateGroups: validateGroups,
  validateInput: validateInput,
  validateProperties: validateProperties
};

/*
 * Cookie data
 */

var _options = {
  expirationDays: undefined,
  domain: undefined
};

var reset = function reset() {
  _options = {
    expirationDays: undefined,
    domain: undefined
  };
};

var options = function options(opts) {
  if (arguments.length === 0) {
    return _options;
  }

  opts = opts || {};

  _options.expirationDays = opts.expirationDays;

  var domain = !utils.isEmptyString(opts.domain) ? opts.domain : '.' + lib(window.location.href);
  var token = Math.random();
  _options.domain = domain;
  set('amplitude_test', token);
  var stored = get('amplitude_test');
  if (!stored || stored !== token) {
    domain = null;
  }
  remove('amplitude_test');
  _options.domain = domain;
};

var _domainSpecific = function _domainSpecific(name) {
  // differentiate between cookies on different domains
  var suffix = '';
  if (_options.domain) {
    suffix = _options.domain.charAt(0) === '.' ? _options.domain.substring(1) : _options.domain;
  }
  return name + suffix;
};

var get = function get(name) {
  try {
    var nameEq = _domainSpecific(name) + '=';
    var ca = document.cookie.split(';');
    var value = null;
    for (var i = 0; i < ca.length; i++) {
      var c = ca[i];
      while (c.charAt(0) === ' ') {
        c = c.substring(1, c.length);
      }
      if (c.indexOf(nameEq) === 0) {
        value = c.substring(nameEq.length, c.length);
        break;
      }
    }

    if (value) {
      return JSON.parse(Base64.decode(value));
    }
    return null;
  } catch (e) {
    return null;
  }
};

var set = function set(name, value) {
  try {
    _set(_domainSpecific(name), Base64.encode(JSON.stringify(value)), _options);
    return true;
  } catch (e) {
    return false;
  }
};

var _set = function _set(name, value, opts) {
  var expires = value !== null ? opts.expirationDays : -1;
  if (expires) {
    var date = new Date();
    date.setTime(date.getTime() + expires * 24 * 60 * 60 * 1000);
    expires = date;
  }
  var str = name + '=' + value;
  if (expires) {
    str += '; expires=' + expires.toUTCString();
  }
  str += '; path=/';
  if (opts.domain) {
    str += '; domain=' + opts.domain;
  }
  document.cookie = str;
};

var remove = function remove(name) {
  try {
    _set(_domainSpecific(name), null, _options);
    return true;
  } catch (e) {
    return false;
  }
};

var Cookie = {
  reset: reset,
  options: options,
  get: get,
  set: set,
  remove: remove

};

/* jshint -W020, unused: false, noempty: false, boss: true */

/*
 * Implement localStorage to support Firefox 2-3 and IE 5-7
 */
var localStorage; // jshint ignore:line

// test that Window.localStorage is available and works
function windowLocalStorageAvailable() {
  var uid = new Date();
  var result;
  try {
    window.localStorage.setItem(uid, uid);
    result = window.localStorage.getItem(uid) === String(uid);
    window.localStorage.removeItem(uid);
    return result;
  } catch (e) {
    // localStorage not available
  }
  return false;
}

if (windowLocalStorageAvailable()) {
  localStorage = window.localStorage;
} else if (window.globalStorage) {
  // Firefox 2-3 use globalStorage
  // See https://developer.mozilla.org/en/dom/storage#globalStorage
  try {
    localStorage = window.globalStorage[window.location.hostname];
  } catch (e) {
    // Something bad happened...
  }
} else {
  // IE 5-7 use userData
  // See http://msdn.microsoft.com/en-us/library/ms531424(v=vs.85).aspx
  var div = document.createElement('div'),
      attrKey = 'localStorage';
  div.style.display = 'none';
  document.getElementsByTagName('head')[0].appendChild(div);
  if (div.addBehavior) {
    div.addBehavior('#default#userdata');
    localStorage = {
      length: 0,
      setItem: function setItem(k, v) {
        div.load(attrKey);
        if (!div.getAttribute(k)) {
          this.length++;
        }
        div.setAttribute(k, v);
        div.save(attrKey);
      },
      getItem: function getItem(k) {
        div.load(attrKey);
        return div.getAttribute(k);
      },
      removeItem: function removeItem(k) {
        div.load(attrKey);
        if (div.getAttribute(k)) {
          this.length--;
        }
        div.removeAttribute(k);
        div.save(attrKey);
      },
      clear: function clear() {
        div.load(attrKey);
        var i = 0;
        var attr;
        while (attr = div.XMLDocument.documentElement.attributes[i++]) {
          div.removeAttribute(attr.name);
        }
        div.save(attrKey);
        this.length = 0;
      },
      key: function key(k) {
        div.load(attrKey);
        return div.XMLDocument.documentElement.attributes[k];
      }
    };
    div.load(attrKey);
    localStorage.length = div.XMLDocument.documentElement.attributes.length;
  } else {
    /* Nothing we can do ... */
  }
}
if (!localStorage) {
  localStorage = {
    length: 0,
    setItem: function setItem(k, v) {},
    getItem: function getItem(k) {},
    removeItem: function removeItem(k) {},
    clear: function clear() {},
    key: function key(k) {}
  };
}

var localStorage$1 = localStorage;

/* jshint -W020, unused: false, noempty: false, boss: true */

/*
 * Abstraction layer for cookie storage.
 * Uses cookie if available, otherwise fallback to localstorage.
 */

var cookieStorage = function cookieStorage() {
  this.storage = null;
};

// test that cookies are enabled - navigator.cookiesEnabled yields false positives in IE, need to test directly
cookieStorage.prototype._cookiesEnabled = function () {
  var uid = String(new Date());
  var result;
  try {
    Cookie.set(constants.COOKIE_TEST, uid);
    result = Cookie.get(constants.COOKIE_TEST) === uid;
    Cookie.remove(constants.COOKIE_TEST);
    return result;
  } catch (e) {
    // cookies are not enabled
  }
  return false;
};

cookieStorage.prototype.getStorage = function () {
  if (this.storage !== null) {
    return this.storage;
  }

  if (this._cookiesEnabled()) {
    this.storage = Cookie;
  } else {
    // if cookies disabled, fallback to localstorage
    // note: localstorage does not persist across subdomains
    var keyPrefix = 'amp_cookiestore_';
    this.storage = {
      _options: {
        expirationDays: undefined,
        domain: undefined
      },
      reset: function reset() {
        this._options = {
          expirationDays: undefined,
          domain: undefined
        };
      },
      options: function options(opts) {
        if (arguments.length === 0) {
          return this._options;
        }
        opts = opts || {};
        this._options.expirationDays = opts.expirationDays || this._options.expirationDays;
        // localStorage is specific to subdomains
        this._options.domain = opts.domain || this._options.domain || window.location.hostname;
        return this._options;
      },
      get: function get(name) {
        try {
          return JSON.parse(localStorage$1.getItem(keyPrefix + name));
        } catch (e) {}
        return null;
      },
      set: function set(name, value) {
        try {
          localStorage$1.setItem(keyPrefix + name, JSON.stringify(value));
          return true;
        } catch (e) {}
        return false;
      },
      remove: function remove(name) {
        try {
          localStorage$1.removeItem(keyPrefix + name);
        } catch (e) {
          return false;
        }
      }
    };
  }

  return this.storage;
};

var getUtmData = function getUtmData(rawCookie, query) {
  // Translate the utmz cookie format into url query string format.
  var cookie = rawCookie ? '?' + rawCookie.split('.').slice(-1)[0].replace(/\|/g, '&') : '';

  var fetchParam = function fetchParam(queryName, query, cookieName, cookie) {
    return utils.getQueryParam(queryName, query) || utils.getQueryParam(cookieName, cookie);
  };

  var utmSource = fetchParam('utm_source', query, 'utmcsr', cookie);
  var utmMedium = fetchParam('utm_medium', query, 'utmcmd', cookie);
  var utmCampaign = fetchParam('utm_campaign', query, 'utmccn', cookie);
  var utmTerm = fetchParam('utm_term', query, 'utmctr', cookie);
  var utmContent = fetchParam('utm_content', query, 'utmcct', cookie);

  var utmData = {};
  var addIfNotNull = function addIfNotNull(key, value) {
    if (!utils.isEmptyString(value)) {
      utmData[key] = value;
    }
  };

  addIfNotNull('utm_source', utmSource);
  addIfNotNull('utm_medium', utmMedium);
  addIfNotNull('utm_campaign', utmCampaign);
  addIfNotNull('utm_term', utmTerm);
  addIfNotNull('utm_content', utmContent);

  return utmData;
};

/*
 * Wrapper for a user properties JSON object that supports operations.
 * Note: if a user property is used in multiple operations on the same Identify object,
 * only the first operation will be saved, and the rest will be ignored.
 */

var AMP_OP_ADD = '$add';
var AMP_OP_APPEND = '$append';
var AMP_OP_CLEAR_ALL = '$clearAll';
var AMP_OP_PREPEND = '$prepend';
var AMP_OP_SET = '$set';
var AMP_OP_SET_ONCE = '$setOnce';
var AMP_OP_UNSET = '$unset';

/**
 * Identify API - instance constructor. Identify objects are a wrapper for user property operations.
 * Each method adds a user property operation to the Identify object, and returns the same Identify object,
 * allowing you to chain multiple method calls together.
 * Note: if the same user property is used in multiple operations on a single Identify object,
 * only the first operation on that property will be saved, and the rest will be ignored.
 * See [Readme]{@link https://github.com/amplitude/Amplitude-Javascript#user-properties-and-user-property-operations}
 * for more information on the Identify API and user property operations.
 * @constructor Identify
 * @public
 * @example var identify = new amplitude.Identify();
 */
var Identify = function Identify() {
  this.userPropertiesOperations = {};
  this.properties = []; // keep track of keys that have been added
};

/**
 * Increment a user property by a given value (can also be negative to decrement).
 * If the user property does not have a value set yet, it will be initialized to 0 before being incremented.
 * @public
 * @param {string} property - The user property key.
 * @param {number|string} value - The amount by which to increment the user property. Allows numbers as strings (ex: '123').
 * @return {Identify} Returns the same Identify object, allowing you to chain multiple method calls together.
 * @example var identify = new amplitude.Identify().add('karma', 1).add('friends', 1);
 * amplitude.identify(identify); // send the Identify call
 */
Identify.prototype.add = function (property, value) {
  if (type(value) === 'number' || type(value) === 'string') {
    this._addOperation(AMP_OP_ADD, property, value);
  } else {
    utils.log.error('Unsupported type for value: ' + type(value) + ', expecting number or string');
  }
  return this;
};

/**
 * Append a value or values to a user property.
 * If the user property does not have a value set yet,
 * it will be initialized to an empty list before the new values are appended.
 * If the user property has an existing value and it is not a list,
 * the existing value will be converted into a list with the new values appended.
 * @public
 * @param {string} property - The user property key.
 * @param {number|string|list|object} value - A value or values to append.
 * Values can be numbers, strings, lists, or object (key:value dict will be flattened).
 * @return {Identify} Returns the same Identify object, allowing you to chain multiple method calls together.
 * @example var identify = new amplitude.Identify().append('ab-tests', 'new-user-tests');
 * identify.append('some_list', [1, 2, 3, 4, 'values']);
 * amplitude.identify(identify); // send the Identify call
 */
Identify.prototype.append = function (property, value) {
  this._addOperation(AMP_OP_APPEND, property, value);
  return this;
};

/**
 * Clear all user properties for the current user.
 * SDK user should instead call amplitude.clearUserProperties() instead of using this.
 * $clearAll needs to be sent on its own Identify object. If there are already other operations, then don't add $clearAll.
 * If $clearAll already in an Identify object, don't allow other operations to be added.
 * @private
 */
Identify.prototype.clearAll = function () {
  if (Object.keys(this.userPropertiesOperations).length > 0) {
    if (!this.userPropertiesOperations.hasOwnProperty(AMP_OP_CLEAR_ALL)) {
      utils.log.error('Need to send $clearAll on its own Identify object without any other operations, skipping $clearAll');
    }
    return this;
  }
  this.userPropertiesOperations[AMP_OP_CLEAR_ALL] = '-';
  return this;
};

/**
 * Prepend a value or values to a user property.
 * Prepend means inserting the value or values at the front of a list.
 * If the user property does not have a value set yet,
 * it will be initialized to an empty list before the new values are prepended.
 * If the user property has an existing value and it is not a list,
 * the existing value will be converted into a list with the new values prepended.
 * @public
 * @param {string} property - The user property key.
 * @param {number|string|list|object} value - A value or values to prepend.
 * Values can be numbers, strings, lists, or object (key:value dict will be flattened).
 * @return {Identify} Returns the same Identify object, allowing you to chain multiple method calls together.
 * @example var identify = new amplitude.Identify().prepend('ab-tests', 'new-user-tests');
 * identify.prepend('some_list', [1, 2, 3, 4, 'values']);
 * amplitude.identify(identify); // send the Identify call
 */
Identify.prototype.prepend = function (property, value) {
  this._addOperation(AMP_OP_PREPEND, property, value);
  return this;
};

/**
 * Sets the value of a given user property. If a value already exists, it will be overwriten with the new value.
 * @public
 * @param {string} property - The user property key.
 * @param {number|string|list|object} value - A value or values to set.
 * Values can be numbers, strings, lists, or object (key:value dict will be flattened).
 * @return {Identify} Returns the same Identify object, allowing you to chain multiple method calls together.
 * @example var identify = new amplitude.Identify().set('user_type', 'beta');
 * identify.set('name', {'first': 'John', 'last': 'Doe'}); // dict is flattened and becomes name.first: John, name.last: Doe
 * amplitude.identify(identify); // send the Identify call
 */
Identify.prototype.set = function (property, value) {
  this._addOperation(AMP_OP_SET, property, value);
  return this;
};

/**
 * Sets the value of a given user property only once. Subsequent setOnce operations on that user property will be ignored;
 * however, that user property can still be modified through any of the other operations.
 * Useful for capturing properties such as 'initial_signup_date', 'initial_referrer', etc.
 * @public
 * @param {string} property - The user property key.
 * @param {number|string|list|object} value - A value or values to set once.
 * Values can be numbers, strings, lists, or object (key:value dict will be flattened).
 * @return {Identify} Returns the same Identify object, allowing you to chain multiple method calls together.
 * @example var identify = new amplitude.Identify().setOnce('sign_up_date', '2016-04-01');
 * amplitude.identify(identify); // send the Identify call
 */
Identify.prototype.setOnce = function (property, value) {
  this._addOperation(AMP_OP_SET_ONCE, property, value);
  return this;
};

/**
 * Unset and remove a user property. This user property will no longer show up in a user's profile.
 * @public
 * @param {string} property - The user property key.
 * @return {Identify} Returns the same Identify object, allowing you to chain multiple method calls together.
 * @example var identify = new amplitude.Identify().unset('user_type').unset('age');
 * amplitude.identify(identify); // send the Identify call
 */
Identify.prototype.unset = function (property) {
  this._addOperation(AMP_OP_UNSET, property, '-');
  return this;
};

/**
 * Helper function that adds operation to the Identify's object
 * Handle's filtering of duplicate user property keys, and filtering for clearAll.
 * @private
 */
Identify.prototype._addOperation = function (operation, property, value) {
  // check that the identify doesn't already contain a clearAll
  if (this.userPropertiesOperations.hasOwnProperty(AMP_OP_CLEAR_ALL)) {
    utils.log.error('This identify already contains a $clearAll operation, skipping operation ' + operation);
    return;
  }

  // check that property wasn't already used in this Identify
  if (this.properties.indexOf(property) !== -1) {
    utils.log.error('User property "' + property + '" already used in this identify, skipping operation ' + operation);
    return;
  }

  if (!this.userPropertiesOperations.hasOwnProperty(operation)) {
    this.userPropertiesOperations[operation] = {};
  }
  this.userPropertiesOperations[operation][property] = value;
  this.properties.push(property);
};

var md5 = createCommonjsModule(function (module) {
/*
 * JavaScript MD5
 * https://github.com/blueimp/JavaScript-MD5
 *
 * Copyright 2011, Sebastian Tschan
 * https://blueimp.net
 *
 * Licensed under the MIT license:
 * https://opensource.org/licenses/MIT
 *
 * Based on
 * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
 * Digest Algorithm, as defined in RFC 1321.
 * Version 2.2 Copyright (C) Paul Johnston 1999 - 2009
 * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
 * Distributed under the BSD License
 * See http://pajhome.org.uk/crypt/md5 for more info.
 */

/* global define */

(function ($) {
  'use strict';

  /*
  * Add integers, wrapping at 2^32. This uses 16-bit operations internally
  * to work around bugs in some JS interpreters.
  */
  function safeAdd (x, y) {
    var lsw = (x & 0xffff) + (y & 0xffff);
    var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
    return (msw << 16) | (lsw & 0xffff)
  }

  /*
  * Bitwise rotate a 32-bit number to the left.
  */
  function bitRotateLeft (num, cnt) {
    return (num << cnt) | (num >>> (32 - cnt))
  }

  /*
  * These functions implement the four basic operations the algorithm uses.
  */
  function md5cmn (q, a, b, x, s, t) {
    return safeAdd(bitRotateLeft(safeAdd(safeAdd(a, q), safeAdd(x, t)), s), b)
  }
  function md5ff (a, b, c, d, x, s, t) {
    return md5cmn((b & c) | (~b & d), a, b, x, s, t)
  }
  function md5gg (a, b, c, d, x, s, t) {
    return md5cmn((b & d) | (c & ~d), a, b, x, s, t)
  }
  function md5hh (a, b, c, d, x, s, t) {
    return md5cmn(b ^ c ^ d, a, b, x, s, t)
  }
  function md5ii (a, b, c, d, x, s, t) {
    return md5cmn(c ^ (b | ~d), a, b, x, s, t)
  }

  /*
  * Calculate the MD5 of an array of little-endian words, and a bit length.
  */
  function binlMD5 (x, len) {
    /* append padding */
    x[len >> 5] |= 0x80 << (len % 32);
    x[((len + 64) >>> 9 << 4) + 14] = len;

    var i;
    var olda;
    var oldb;
    var oldc;
    var oldd;
    var a = 1732584193;
    var b = -271733879;
    var c = -1732584194;
    var d = 271733878;

    for (i = 0; i < x.length; i += 16) {
      olda = a;
      oldb = b;
      oldc = c;
      oldd = d;

      a = md5ff(a, b, c, d, x[i], 7, -680876936);
      d = md5ff(d, a, b, c, x[i + 1], 12, -389564586);
      c = md5ff(c, d, a, b, x[i + 2], 17, 606105819);
      b = md5ff(b, c, d, a, x[i + 3], 22, -1044525330);
      a = md5ff(a, b, c, d, x[i + 4], 7, -176418897);
      d = md5ff(d, a, b, c, x[i + 5], 12, 1200080426);
      c = md5ff(c, d, a, b, x[i + 6], 17, -1473231341);
      b = md5ff(b, c, d, a, x[i + 7], 22, -45705983);
      a = md5ff(a, b, c, d, x[i + 8], 7, 1770035416);
      d = md5ff(d, a, b, c, x[i + 9], 12, -1958414417);
      c = md5ff(c, d, a, b, x[i + 10], 17, -42063);
      b = md5ff(b, c, d, a, x[i + 11], 22, -1990404162);
      a = md5ff(a, b, c, d, x[i + 12], 7, 1804603682);
      d = md5ff(d, a, b, c, x[i + 13], 12, -40341101);
      c = md5ff(c, d, a, b, x[i + 14], 17, -1502002290);
      b = md5ff(b, c, d, a, x[i + 15], 22, 1236535329);

      a = md5gg(a, b, c, d, x[i + 1], 5, -165796510);
      d = md5gg(d, a, b, c, x[i + 6], 9, -1069501632);
      c = md5gg(c, d, a, b, x[i + 11], 14, 643717713);
      b = md5gg(b, c, d, a, x[i], 20, -373897302);
      a = md5gg(a, b, c, d, x[i + 5], 5, -701558691);
      d = md5gg(d, a, b, c, x[i + 10], 9, 38016083);
      c = md5gg(c, d, a, b, x[i + 15], 14, -660478335);
      b = md5gg(b, c, d, a, x[i + 4], 20, -405537848);
      a = md5gg(a, b, c, d, x[i + 9], 5, 568446438);
      d = md5gg(d, a, b, c, x[i + 14], 9, -1019803690);
      c = md5gg(c, d, a, b, x[i + 3], 14, -187363961);
      b = md5gg(b, c, d, a, x[i + 8], 20, 1163531501);
      a = md5gg(a, b, c, d, x[i + 13], 5, -1444681467);
      d = md5gg(d, a, b, c, x[i + 2], 9, -51403784);
      c = md5gg(c, d, a, b, x[i + 7], 14, 1735328473);
      b = md5gg(b, c, d, a, x[i + 12], 20, -1926607734);

      a = md5hh(a, b, c, d, x[i + 5], 4, -378558);
      d = md5hh(d, a, b, c, x[i + 8], 11, -2022574463);
      c = md5hh(c, d, a, b, x[i + 11], 16, 1839030562);
      b = md5hh(b, c, d, a, x[i + 14], 23, -35309556);
      a = md5hh(a, b, c, d, x[i + 1], 4, -1530992060);
      d = md5hh(d, a, b, c, x[i + 4], 11, 1272893353);
      c = md5hh(c, d, a, b, x[i + 7], 16, -155497632);
      b = md5hh(b, c, d, a, x[i + 10], 23, -1094730640);
      a = md5hh(a, b, c, d, x[i + 13], 4, 681279174);
      d = md5hh(d, a, b, c, x[i], 11, -358537222);
      c = md5hh(c, d, a, b, x[i + 3], 16, -722521979);
      b = md5hh(b, c, d, a, x[i + 6], 23, 76029189);
      a = md5hh(a, b, c, d, x[i + 9], 4, -640364487);
      d = md5hh(d, a, b, c, x[i + 12], 11, -421815835);
      c = md5hh(c, d, a, b, x[i + 15], 16, 530742520);
      b = md5hh(b, c, d, a, x[i + 2], 23, -995338651);

      a = md5ii(a, b, c, d, x[i], 6, -198630844);
      d = md5ii(d, a, b, c, x[i + 7], 10, 1126891415);
      c = md5ii(c, d, a, b, x[i + 14], 15, -1416354905);
      b = md5ii(b, c, d, a, x[i + 5], 21, -57434055);
      a = md5ii(a, b, c, d, x[i + 12], 6, 1700485571);
      d = md5ii(d, a, b, c, x[i + 3], 10, -1894986606);
      c = md5ii(c, d, a, b, x[i + 10], 15, -1051523);
      b = md5ii(b, c, d, a, x[i + 1], 21, -2054922799);
      a = md5ii(a, b, c, d, x[i + 8], 6, 1873313359);
      d = md5ii(d, a, b, c, x[i + 15], 10, -30611744);
      c = md5ii(c, d, a, b, x[i + 6], 15, -1560198380);
      b = md5ii(b, c, d, a, x[i + 13], 21, 1309151649);
      a = md5ii(a, b, c, d, x[i + 4], 6, -145523070);
      d = md5ii(d, a, b, c, x[i + 11], 10, -1120210379);
      c = md5ii(c, d, a, b, x[i + 2], 15, 718787259);
      b = md5ii(b, c, d, a, x[i + 9], 21, -343485551);

      a = safeAdd(a, olda);
      b = safeAdd(b, oldb);
      c = safeAdd(c, oldc);
      d = safeAdd(d, oldd);
    }
    return [a, b, c, d]
  }

  /*
  * Convert an array of little-endian words to a string
  */
  function binl2rstr (input) {
    var i;
    var output = '';
    var length32 = input.length * 32;
    for (i = 0; i < length32; i += 8) {
      output += String.fromCharCode((input[i >> 5] >>> (i % 32)) & 0xff);
    }
    return output
  }

  /*
  * Convert a raw string to an array of little-endian words
  * Characters >255 have their high-byte silently ignored.
  */
  function rstr2binl (input) {
    var i;
    var output = [];
    output[(input.length >> 2) - 1] = undefined;
    for (i = 0; i < output.length; i += 1) {
      output[i] = 0;
    }
    var length8 = input.length * 8;
    for (i = 0; i < length8; i += 8) {
      output[i >> 5] |= (input.charCodeAt(i / 8) & 0xff) << (i % 32);
    }
    return output
  }

  /*
  * Calculate the MD5 of a raw string
  */
  function rstrMD5 (s) {
    return binl2rstr(binlMD5(rstr2binl(s), s.length * 8))
  }

  /*
  * Calculate the HMAC-MD5, of a key and some data (raw strings)
  */
  function rstrHMACMD5 (key, data) {
    var i;
    var bkey = rstr2binl(key);
    var ipad = [];
    var opad = [];
    var hash;
    ipad[15] = opad[15] = undefined;
    if (bkey.length > 16) {
      bkey = binlMD5(bkey, key.length * 8);
    }
    for (i = 0; i < 16; i += 1) {
      ipad[i] = bkey[i] ^ 0x36363636;
      opad[i] = bkey[i] ^ 0x5c5c5c5c;
    }
    hash = binlMD5(ipad.concat(rstr2binl(data)), 512 + data.length * 8);
    return binl2rstr(binlMD5(opad.concat(hash), 512 + 128))
  }

  /*
  * Convert a raw string to a hex string
  */
  function rstr2hex (input) {
    var hexTab = '0123456789abcdef';
    var output = '';
    var x;
    var i;
    for (i = 0; i < input.length; i += 1) {
      x = input.charCodeAt(i);
      output += hexTab.charAt((x >>> 4) & 0x0f) + hexTab.charAt(x & 0x0f);
    }
    return output
  }

  /*
  * Encode a string as utf-8
  */
  function str2rstrUTF8 (input) {
    return unescape(encodeURIComponent(input))
  }

  /*
  * Take string arguments and return either raw or hex encoded strings
  */
  function rawMD5 (s) {
    return rstrMD5(str2rstrUTF8(s))
  }
  function hexMD5 (s) {
    return rstr2hex(rawMD5(s))
  }
  function rawHMACMD5 (k, d) {
    return rstrHMACMD5(str2rstrUTF8(k), str2rstrUTF8(d))
  }
  function hexHMACMD5 (k, d) {
    return rstr2hex(rawHMACMD5(k, d))
  }

  function md5 (string, key, raw) {
    if (!key) {
      if (!raw) {
        return hexMD5(string)
      }
      return rawMD5(string)
    }
    if (!raw) {
      return hexHMACMD5(key, string)
    }
    return rawHMACMD5(key, string)
  }

  if (typeof undefined === 'function' && undefined.amd) {
    undefined(function () {
      return md5
    });
  } else if ('object' === 'object' && module.exports) {
    module.exports = md5;
  } else {
    $.md5 = md5;
  }
})(commonjsGlobal);
});

/**
 * Removes all key-value entries from the list cache.
 *
 * @private
 * @name clear
 * @memberOf ListCache
 */
function listCacheClear() {
  this.__data__ = [];
  this.size = 0;
}

var _listCacheClear = listCacheClear;

/**
 * Performs a
 * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
 * comparison between two values to determine if they are equivalent.
 *
 * @static
 * @memberOf _
 * @since 4.0.0
 * @category Lang
 * @param {*} value The value to compare.
 * @param {*} other The other value to compare.
 * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
 * @example
 *
 * var object = { 'a': 1 };
 * var other = { 'a': 1 };
 *
 * _.eq(object, object);
 * // => true
 *
 * _.eq(object, other);
 * // => false
 *
 * _.eq('a', 'a');
 * // => true
 *
 * _.eq('a', Object('a'));
 * // => false
 *
 * _.eq(NaN, NaN);
 * // => true
 */
function eq(value, other) {
  return value === other || (value !== value && other !== other);
}

var eq_1 = eq;

/**
 * Gets the index at which the `key` is found in `array` of key-value pairs.
 *
 * @private
 * @param {Array} array The array to inspect.
 * @param {*} key The key to search for.
 * @returns {number} Returns the index of the matched value, else `-1`.
 */
function assocIndexOf(array, key) {
  var length = array.length;
  while (length--) {
    if (eq_1(array[length][0], key)) {
      return length;
    }
  }
  return -1;
}

var _assocIndexOf = assocIndexOf;

/** Used for built-in method references. */
var arrayProto = Array.prototype;

/** Built-in value references. */
var splice = arrayProto.splice;

/**
 * Removes `key` and its value from the list cache.
 *
 * @private
 * @name delete
 * @memberOf ListCache
 * @param {string} key The key of the value to remove.
 * @returns {boolean} Returns `true` if the entry was removed, else `false`.
 */
function listCacheDelete(key) {
  var data = this.__data__,
      index = _assocIndexOf(data, key);

  if (index < 0) {
    return false;
  }
  var lastIndex = data.length - 1;
  if (index == lastIndex) {
    data.pop();
  } else {
    splice.call(data, index, 1);
  }
  --this.size;
  return true;
}

var _listCacheDelete = listCacheDelete;

/**
 * Gets the list cache value for `key`.
 *
 * @private
 * @name get
 * @memberOf ListCache
 * @param {string} key The key of the value to get.
 * @returns {*} Returns the entry value.
 */
function listCacheGet(key) {
  var data = this.__data__,
      index = _assocIndexOf(data, key);

  return index < 0 ? undefined : data[index][1];
}

var _listCacheGet = listCacheGet;

/**
 * Checks if a list cache value for `key` exists.
 *
 * @private
 * @name has
 * @memberOf ListCache
 * @param {string} key The key of the entry to check.
 * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
 */
function listCacheHas(key) {
  return _assocIndexOf(this.__data__, key) > -1;
}

var _listCacheHas = listCacheHas;

/**
 * Sets the list cache `key` to `value`.
 *
 * @private
 * @name set
 * @memberOf ListCache
 * @param {string} key The key of the value to set.
 * @param {*} value The value to set.
 * @returns {Object} Returns the list cache instance.
 */
function listCacheSet(key, value) {
  var data = this.__data__,
      index = _assocIndexOf(data, key);

  if (index < 0) {
    ++this.size;
    data.push([key, value]);
  } else {
    data[index][1] = value;
  }
  return this;
}

var _listCacheSet = listCacheSet;

/**
 * Creates an list cache object.
 *
 * @private
 * @constructor
 * @param {Array} [entries] The key-value pairs to cache.
 */
function ListCache(entries) {
  var index = -1,
      length = entries == null ? 0 : entries.length;

  this.clear();
  while (++index < length) {
    var entry = entries[index];
    this.set(entry[0], entry[1]);
  }
}

// Add methods to `ListCache`.
ListCache.prototype.clear = _listCacheClear;
ListCache.prototype['delete'] = _listCacheDelete;
ListCache.prototype.get = _listCacheGet;
ListCache.prototype.has = _listCacheHas;
ListCache.prototype.set = _listCacheSet;

var _ListCache = ListCache;

/**
 * Removes all key-value entries from the stack.
 *
 * @private
 * @name clear
 * @memberOf Stack
 */
function stackClear() {
  this.__data__ = new _ListCache;
  this.size = 0;
}

var _stackClear = stackClear;

/**
 * Removes `key` and its value from the stack.
 *
 * @private
 * @name delete
 * @memberOf Stack
 * @param {string} key The key of the value to remove.
 * @returns {boolean} Returns `true` if the entry was removed, else `false`.
 */
function stackDelete(key) {
  var data = this.__data__,
      result = data['delete'](key);

  this.size = data.size;
  return result;
}

var _stackDelete = stackDelete;

/**
 * Gets the stack value for `key`.
 *
 * @private
 * @name get
 * @memberOf Stack
 * @param {string} key The key of the value to get.
 * @returns {*} Returns the entry value.
 */
function stackGet(key) {
  return this.__data__.get(key);
}

var _stackGet = stackGet;

/**
 * Checks if a stack value for `key` exists.
 *
 * @private
 * @name has
 * @memberOf Stack
 * @param {string} key The key of the entry to check.
 * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
 */
function stackHas(key) {
  return this.__data__.has(key);
}

var _stackHas = stackHas;

/** Detect free variable `global` from Node.js. */
var freeGlobal = typeof commonjsGlobal == 'object' && commonjsGlobal && commonjsGlobal.Object === Object && commonjsGlobal;

var _freeGlobal = freeGlobal;

/** Detect free variable `self`. */
var freeSelf = typeof self == 'object' && self && self.Object === Object && self;

/** Used as a reference to the global object. */
var root = _freeGlobal || freeSelf || Function('return this')();

var _root = root;

/** Built-in value references. */
var Symbol$1 = _root.Symbol;

var _Symbol = Symbol$1;

/** Used for built-in method references. */
var objectProto$1 = Object.prototype;

/** Used to check objects for own properties. */
var hasOwnProperty$1 = objectProto$1.hasOwnProperty;

/**
 * Used to resolve the
 * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
 * of values.
 */
var nativeObjectToString = objectProto$1.toString;

/** Built-in value references. */
var symToStringTag$1 = _Symbol ? _Symbol.toStringTag : undefined;

/**
 * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
 *
 * @private
 * @param {*} value The value to query.
 * @returns {string} Returns the raw `toStringTag`.
 */
function getRawTag(value) {
  var isOwn = hasOwnProperty$1.call(value, symToStringTag$1),
      tag = value[symToStringTag$1];

  try {
    value[symToStringTag$1] = undefined;
    var unmasked = true;
  } catch (e) {}

  var result = nativeObjectToString.call(value);
  if (unmasked) {
    if (isOwn) {
      value[symToStringTag$1] = tag;
    } else {
      delete value[symToStringTag$1];
    }
  }
  return result;
}

var _getRawTag = getRawTag;

/** Used for built-in method references. */
var objectProto$2 = Object.prototype;

/**
 * Used to resolve the
 * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
 * of values.
 */
var nativeObjectToString$1 = objectProto$2.toString;

/**
 * Converts `value` to a string using `Object.prototype.toString`.
 *
 * @private
 * @param {*} value The value to convert.
 * @returns {string} Returns the converted string.
 */
function objectToString(value) {
  return nativeObjectToString$1.call(value);
}

var _objectToString = objectToString;

/** `Object#toString` result references. */
var nullTag = '[object Null]';
var undefinedTag = '[object Undefined]';

/** Built-in value references. */
var symToStringTag = _Symbol ? _Symbol.toStringTag : undefined;

/**
 * The base implementation of `getTag` without fallbacks for buggy environments.
 *
 * @private
 * @param {*} value The value to query.
 * @returns {string} Returns the `toStringTag`.
 */
function baseGetTag(value) {
  if (value == null) {
    return value === undefined ? undefinedTag : nullTag;
  }
  return (symToStringTag && symToStringTag in Object(value))
    ? _getRawTag(value)
    : _objectToString(value);
}

var _baseGetTag = baseGetTag;

/**
 * Checks if `value` is the
 * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
 * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
 *
 * @static
 * @memberOf _
 * @since 0.1.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is an object, else `false`.
 * @example
 *
 * _.isObject({});
 * // => true
 *
 * _.isObject([1, 2, 3]);
 * // => true
 *
 * _.isObject(_.noop);
 * // => true
 *
 * _.isObject(null);
 * // => false
 */
function isObject(value) {
  var type = typeof value;
  return value != null && (type == 'object' || type == 'function');
}

var isObject_1 = isObject;

/** `Object#toString` result references. */
var asyncTag = '[object AsyncFunction]';
var funcTag = '[object Function]';
var genTag = '[object GeneratorFunction]';
var proxyTag = '[object Proxy]';

/**
 * Checks if `value` is classified as a `Function` object.
 *
 * @static
 * @memberOf _
 * @since 0.1.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a function, else `false`.
 * @example
 *
 * _.isFunction(_);
 * // => true
 *
 * _.isFunction(/abc/);
 * // => false
 */
function isFunction(value) {
  if (!isObject_1(value)) {
    return false;
  }
  // The use of `Object#toString` avoids issues with the `typeof` operator
  // in Safari 9 which returns 'object' for typed arrays and other constructors.
  var tag = _baseGetTag(value);
  return tag == funcTag || tag == genTag || tag == asyncTag || tag == proxyTag;
}

var isFunction_1 = isFunction;

/** Used to detect overreaching core-js shims. */
var coreJsData = _root['__core-js_shared__'];

var _coreJsData = coreJsData;

/** Used to detect methods masquerading as native. */
var maskSrcKey = (function() {
  var uid = /[^.]+$/.exec(_coreJsData && _coreJsData.keys && _coreJsData.keys.IE_PROTO || '');
  return uid ? ('Symbol(src)_1.' + uid) : '';
}());

/**
 * Checks if `func` has its source masked.
 *
 * @private
 * @param {Function} func The function to check.
 * @returns {boolean} Returns `true` if `func` is masked, else `false`.
 */
function isMasked(func) {
  return !!maskSrcKey && (maskSrcKey in func);
}

var _isMasked = isMasked;

/** Used for built-in method references. */
var funcProto$1 = Function.prototype;

/** Used to resolve the decompiled source of functions. */
var funcToString$1 = funcProto$1.toString;

/**
 * Converts `func` to its source code.
 *
 * @private
 * @param {Function} func The function to convert.
 * @returns {string} Returns the source code.
 */
function toSource(func) {
  if (func != null) {
    try {
      return funcToString$1.call(func);
    } catch (e) {}
    try {
      return (func + '');
    } catch (e) {}
  }
  return '';
}

var _toSource = toSource;

/**
 * Used to match `RegExp`
 * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
 */
var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;

/** Used to detect host constructors (Safari). */
var reIsHostCtor = /^\[object .+?Constructor\]$/;

/** Used for built-in method references. */
var funcProto = Function.prototype;
var objectProto = Object.prototype;

/** Used to resolve the decompiled source of functions. */
var funcToString = funcProto.toString;

/** Used to check objects for own properties. */
var hasOwnProperty = objectProto.hasOwnProperty;

/** Used to detect if a method is native. */
var reIsNative = RegExp('^' +
  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
);

/**
 * The base implementation of `_.isNative` without bad shim checks.
 *
 * @private
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a native function,
 *  else `false`.
 */
function baseIsNative(value) {
  if (!isObject_1(value) || _isMasked(value)) {
    return false;
  }
  var pattern = isFunction_1(value) ? reIsNative : reIsHostCtor;
  return pattern.test(_toSource(value));
}

var _baseIsNative = baseIsNative;

/**
 * Gets the value at `key` of `object`.
 *
 * @private
 * @param {Object} [object] The object to query.
 * @param {string} key The key of the property to get.
 * @returns {*} Returns the property value.
 */
function getValue(object, key) {
  return object == null ? undefined : object[key];
}

var _getValue = getValue;

/**
 * Gets the native function at `key` of `object`.
 *
 * @private
 * @param {Object} object The object to query.
 * @param {string} key The key of the method to get.
 * @returns {*} Returns the function if it's native, else `undefined`.
 */
function getNative(object, key) {
  var value = _getValue(object, key);
  return _baseIsNative(value) ? value : undefined;
}

var _getNative = getNative;

/* Built-in method references that are verified to be native. */
var Map = _getNative(_root, 'Map');

var _Map = Map;

/* Built-in method references that are verified to be native. */
var nativeCreate = _getNative(Object, 'create');

var _nativeCreate = nativeCreate;

/**
 * Removes all key-value entries from the hash.
 *
 * @private
 * @name clear
 * @memberOf Hash
 */
function hashClear() {
  this.__data__ = _nativeCreate ? _nativeCreate(null) : {};
  this.size = 0;
}

var _hashClear = hashClear;

/**
 * Removes `key` and its value from the hash.
 *
 * @private
 * @name delete
 * @memberOf Hash
 * @param {Object} hash The hash to modify.
 * @param {string} key The key of the value to remove.
 * @returns {boolean} Returns `true` if the entry was removed, else `false`.
 */
function hashDelete(key) {
  var result = this.has(key) && delete this.__data__[key];
  this.size -= result ? 1 : 0;
  return result;
}

var _hashDelete = hashDelete;

/** Used to stand-in for `undefined` hash values. */
var HASH_UNDEFINED = '__lodash_hash_undefined__';

/** Used for built-in method references. */
var objectProto$3 = Object.prototype;

/** Used to check objects for own properties. */
var hasOwnProperty$2 = objectProto$3.hasOwnProperty;

/**
 * Gets the hash value for `key`.
 *
 * @private
 * @name get
 * @memberOf Hash
 * @param {string} key The key of the value to get.
 * @returns {*} Returns the entry value.
 */
function hashGet(key) {
  var data = this.__data__;
  if (_nativeCreate) {
    var result = data[key];
    return result === HASH_UNDEFINED ? undefined : result;
  }
  return hasOwnProperty$2.call(data, key) ? data[key] : undefined;
}

var _hashGet = hashGet;

/** Used for built-in method references. */
var objectProto$4 = Object.prototype;

/** Used to check objects for own properties. */
var hasOwnProperty$3 = objectProto$4.hasOwnProperty;

/**
 * Checks if a hash value for `key` exists.
 *
 * @private
 * @name has
 * @memberOf Hash
 * @param {string} key The key of the entry to check.
 * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
 */
function hashHas(key) {
  var data = this.__data__;
  return _nativeCreate ? (data[key] !== undefined) : hasOwnProperty$3.call(data, key);
}

var _hashHas = hashHas;

/** Used to stand-in for `undefined` hash values. */
var HASH_UNDEFINED$1 = '__lodash_hash_undefined__';

/**
 * Sets the hash `key` to `value`.
 *
 * @private
 * @name set
 * @memberOf Hash
 * @param {string} key The key of the value to set.
 * @param {*} value The value to set.
 * @returns {Object} Returns the hash instance.
 */
function hashSet(key, value) {
  var data = this.__data__;
  this.size += this.has(key) ? 0 : 1;
  data[key] = (_nativeCreate && value === undefined) ? HASH_UNDEFINED$1 : value;
  return this;
}

var _hashSet = hashSet;

/**
 * Creates a hash object.
 *
 * @private
 * @constructor
 * @param {Array} [entries] The key-value pairs to cache.
 */
function Hash(entries) {
  var index = -1,
      length = entries == null ? 0 : entries.length;

  this.clear();
  while (++index < length) {
    var entry = entries[index];
    this.set(entry[0], entry[1]);
  }
}

// Add methods to `Hash`.
Hash.prototype.clear = _hashClear;
Hash.prototype['delete'] = _hashDelete;
Hash.prototype.get = _hashGet;
Hash.prototype.has = _hashHas;
Hash.prototype.set = _hashSet;

var _Hash = Hash;

/**
 * Removes all key-value entries from the map.
 *
 * @private
 * @name clear
 * @memberOf MapCache
 */
function mapCacheClear() {
  this.size = 0;
  this.__data__ = {
    'hash': new _Hash,
    'map': new (_Map || _ListCache),
    'string': new _Hash
  };
}

var _mapCacheClear = mapCacheClear;

/**
 * Checks if `value` is suitable for use as unique object key.
 *
 * @private
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
 */
function isKeyable(value) {
  var type = typeof value;
  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
    ? (value !== '__proto__')
    : (value === null);
}

var _isKeyable = isKeyable;

/**
 * Gets the data for `map`.
 *
 * @private
 * @param {Object} map The map to query.
 * @param {string} key The reference key.
 * @returns {*} Returns the map data.
 */
function getMapData(map, key) {
  var data = map.__data__;
  return _isKeyable(key)
    ? data[typeof key == 'string' ? 'string' : 'hash']
    : data.map;
}

var _getMapData = getMapData;

/**
 * Removes `key` and its value from the map.
 *
 * @private
 * @name delete
 * @memberOf MapCache
 * @param {string} key The key of the value to remove.
 * @returns {boolean} Returns `true` if the entry was removed, else `false`.
 */
function mapCacheDelete(key) {
  var result = _getMapData(this, key)['delete'](key);
  this.size -= result ? 1 : 0;
  return result;
}

var _mapCacheDelete = mapCacheDelete;

/**
 * Gets the map value for `key`.
 *
 * @private
 * @name get
 * @memberOf MapCache
 * @param {string} key The key of the value to get.
 * @returns {*} Returns the entry value.
 */
function mapCacheGet(key) {
  return _getMapData(this, key).get(key);
}

var _mapCacheGet = mapCacheGet;

/**
 * Checks if a map value for `key` exists.
 *
 * @private
 * @name has
 * @memberOf MapCache
 * @param {string} key The key of the entry to check.
 * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
 */
function mapCacheHas(key) {
  return _getMapData(this, key).has(key);
}

var _mapCacheHas = mapCacheHas;

/**
 * Sets the map `key` to `value`.
 *
 * @private
 * @name set
 * @memberOf MapCache
 * @param {string} key The key of the value to set.
 * @param {*} value The value to set.
 * @returns {Object} Returns the map cache instance.
 */
function mapCacheSet(key, value) {
  var data = _getMapData(this, key),
      size = data.size;

  data.set(key, value);
  this.size += data.size == size ? 0 : 1;
  return this;
}

var _mapCacheSet = mapCacheSet;

/**
 * Creates a map cache object to store key-value pairs.
 *
 * @private
 * @constructor
 * @param {Array} [entries] The key-value pairs to cache.
 */
function MapCache(entries) {
  var index = -1,
      length = entries == null ? 0 : entries.length;

  this.clear();
  while (++index < length) {
    var entry = entries[index];
    this.set(entry[0], entry[1]);
  }
}

// Add methods to `MapCache`.
MapCache.prototype.clear = _mapCacheClear;
MapCache.prototype['delete'] = _mapCacheDelete;
MapCache.prototype.get = _mapCacheGet;
MapCache.prototype.has = _mapCacheHas;
MapCache.prototype.set = _mapCacheSet;

var _MapCache = MapCache;

/** Used as the size to enable large array optimizations. */
var LARGE_ARRAY_SIZE = 200;

/**
 * Sets the stack `key` to `value`.
 *
 * @private
 * @name set
 * @memberOf Stack
 * @param {string} key The key of the value to set.
 * @param {*} value The value to set.
 * @returns {Object} Returns the stack cache instance.
 */
function stackSet(key, value) {
  var data = this.__data__;
  if (data instanceof _ListCache) {
    var pairs = data.__data__;
    if (!_Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
      pairs.push([key, value]);
      this.size = ++data.size;
      return this;
    }
    data = this.__data__ = new _MapCache(pairs);
  }
  data.set(key, value);
  this.size = data.size;
  return this;
}

var _stackSet = stackSet;

/**
 * Creates a stack cache object to store key-value pairs.
 *
 * @private
 * @constructor
 * @param {Array} [entries] The key-value pairs to cache.
 */
function Stack(entries) {
  var data = this.__data__ = new _ListCache(entries);
  this.size = data.size;
}

// Add methods to `Stack`.
Stack.prototype.clear = _stackClear;
Stack.prototype['delete'] = _stackDelete;
Stack.prototype.get = _stackGet;
Stack.prototype.has = _stackHas;
Stack.prototype.set = _stackSet;

var _Stack = Stack;

var defineProperty = (function() {
  try {
    var func = _getNative(Object, 'defineProperty');
    func({}, '', {});
    return func;
  } catch (e) {}
}());

var _defineProperty$1 = defineProperty;

/**
 * The base implementation of `assignValue` and `assignMergeValue` without
 * value checks.
 *
 * @private
 * @param {Object} object The object to modify.
 * @param {string} key The key of the property to assign.
 * @param {*} value The value to assign.
 */
function baseAssignValue(object, key, value) {
  if (key == '__proto__' && _defineProperty$1) {
    _defineProperty$1(object, key, {
      'configurable': true,
      'enumerable': true,
      'value': value,
      'writable': true
    });
  } else {
    object[key] = value;
  }
}

var _baseAssignValue = baseAssignValue;

/**
 * This function is like `assignValue` except that it doesn't assign
 * `undefined` values.
 *
 * @private
 * @param {Object} object The object to modify.
 * @param {string} key The key of the property to assign.
 * @param {*} value The value to assign.
 */
function assignMergeValue(object, key, value) {
  if ((value !== undefined && !eq_1(object[key], value)) ||
      (value === undefined && !(key in object))) {
    _baseAssignValue(object, key, value);
  }
}

var _assignMergeValue = assignMergeValue;

/**
 * Creates a base function for methods like `_.forIn` and `_.forOwn`.
 *
 * @private
 * @param {boolean} [fromRight] Specify iterating from right to left.
 * @returns {Function} Returns the new base function.
 */
function createBaseFor(fromRight) {
  return function(object, iteratee, keysFunc) {
    var index = -1,
        iterable = Object(object),
        props = keysFunc(object),
        length = props.length;

    while (length--) {
      var key = props[fromRight ? length : ++index];
      if (iteratee(iterable[key], key, iterable) === false) {
        break;
      }
    }
    return object;
  };
}

var _createBaseFor = createBaseFor;

/**
 * The base implementation of `baseForOwn` which iterates over `object`
 * properties returned by `keysFunc` and invokes `iteratee` for each property.
 * Iteratee functions may exit iteration early by explicitly returning `false`.
 *
 * @private
 * @param {Object} object The object to iterate over.
 * @param {Function} iteratee The function invoked per iteration.
 * @param {Function} keysFunc The function to get the keys of `object`.
 * @returns {Object} Returns `object`.
 */
var baseFor = _createBaseFor();

var _baseFor = baseFor;

var _cloneBuffer = createCommonjsModule(function (module, exports) {
/** Detect free variable `exports`. */
var freeExports = 'object' == 'object' && exports && !exports.nodeType && exports;

/** Detect free variable `module`. */
var freeModule = freeExports && 'object' == 'object' && module && !module.nodeType && module;

/** Detect the popular CommonJS extension `module.exports`. */
var moduleExports = freeModule && freeModule.exports === freeExports;

/** Built-in value references. */
var Buffer = moduleExports ? _root.Buffer : undefined,
    allocUnsafe = Buffer ? Buffer.allocUnsafe : undefined;

/**
 * Creates a clone of  `buffer`.
 *
 * @private
 * @param {Buffer} buffer The buffer to clone.
 * @param {boolean} [isDeep] Specify a deep clone.
 * @returns {Buffer} Returns the cloned buffer.
 */
function cloneBuffer(buffer, isDeep) {
  if (isDeep) {
    return buffer.slice();
  }
  var length = buffer.length,
      result = allocUnsafe ? allocUnsafe(length) : new buffer.constructor(length);

  buffer.copy(result);
  return result;
}

module.exports = cloneBuffer;
});

/** Built-in value references. */
var Uint8Array = _root.Uint8Array;

var _Uint8Array = Uint8Array;

/**
 * Creates a clone of `arrayBuffer`.
 *
 * @private
 * @param {ArrayBuffer} arrayBuffer The array buffer to clone.
 * @returns {ArrayBuffer} Returns the cloned array buffer.
 */
function cloneArrayBuffer(arrayBuffer) {
  var result = new arrayBuffer.constructor(arrayBuffer.byteLength);
  new _Uint8Array(result).set(new _Uint8Array(arrayBuffer));
  return result;
}

var _cloneArrayBuffer = cloneArrayBuffer;

/**
 * Creates a clone of `typedArray`.
 *
 * @private
 * @param {Object} typedArray The typed array to clone.
 * @param {boolean} [isDeep] Specify a deep clone.
 * @returns {Object} Returns the cloned typed array.
 */
function cloneTypedArray(typedArray, isDeep) {
  var buffer = isDeep ? _cloneArrayBuffer(typedArray.buffer) : typedArray.buffer;
  return new typedArray.constructor(buffer, typedArray.byteOffset, typedArray.length);
}

var _cloneTypedArray = cloneTypedArray;

/**
 * Copies the values of `source` to `array`.
 *
 * @private
 * @param {Array} source The array to copy values from.
 * @param {Array} [array=[]] The array to copy values to.
 * @returns {Array} Returns `array`.
 */
function copyArray(source, array) {
  var index = -1,
      length = source.length;

  array || (array = Array(length));
  while (++index < length) {
    array[index] = source[index];
  }
  return array;
}

var _copyArray = copyArray;

/** Built-in value references. */
var objectCreate = Object.create;

/**
 * The base implementation of `_.create` without support for assigning
 * properties to the created object.
 *
 * @private
 * @param {Object} proto The object to inherit from.
 * @returns {Object} Returns the new object.
 */
var baseCreate = (function() {
  function object() {}
  return function(proto) {
    if (!isObject_1(proto)) {
      return {};
    }
    if (objectCreate) {
      return objectCreate(proto);
    }
    object.prototype = proto;
    var result = new object;
    object.prototype = undefined;
    return result;
  };
}());

var _baseCreate = baseCreate;

/**
 * Creates a unary function that invokes `func` with its argument transformed.
 *
 * @private
 * @param {Function} func The function to wrap.
 * @param {Function} transform The argument transform.
 * @returns {Function} Returns the new function.
 */
function overArg(func, transform) {
  return function(arg) {
    return func(transform(arg));
  };
}

var _overArg = overArg;

/** Built-in value references. */
var getPrototype = _overArg(Object.getPrototypeOf, Object);

var _getPrototype = getPrototype;

/** Used for built-in method references. */
var objectProto$5 = Object.prototype;

/**
 * Checks if `value` is likely a prototype object.
 *
 * @private
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
 */
function isPrototype(value) {
  var Ctor = value && value.constructor,
      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto$5;

  return value === proto;
}

var _isPrototype = isPrototype;

/**
 * Initializes an object clone.
 *
 * @private
 * @param {Object} object The object to clone.
 * @returns {Object} Returns the initialized clone.
 */
function initCloneObject(object) {
  return (typeof object.constructor == 'function' && !_isPrototype(object))
    ? _baseCreate(_getPrototype(object))
    : {};
}

var _initCloneObject = initCloneObject;

/**
 * Checks if `value` is object-like. A value is object-like if it's not `null`
 * and has a `typeof` result of "object".
 *
 * @static
 * @memberOf _
 * @since 4.0.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
 * @example
 *
 * _.isObjectLike({});
 * // => true
 *
 * _.isObjectLike([1, 2, 3]);
 * // => true
 *
 * _.isObjectLike(_.noop);
 * // => false
 *
 * _.isObjectLike(null);
 * // => false
 */
function isObjectLike(value) {
  return value != null && typeof value == 'object';
}

var isObjectLike_1 = isObjectLike;

/** `Object#toString` result references. */
var argsTag = '[object Arguments]';

/**
 * The base implementation of `_.isArguments`.
 *
 * @private
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is an `arguments` object,
 */
function baseIsArguments(value) {
  return isObjectLike_1(value) && _baseGetTag(value) == argsTag;
}

var _baseIsArguments = baseIsArguments;

/** Used for built-in method references. */
var objectProto$6 = Object.prototype;

/** Used to check objects for own properties. */
var hasOwnProperty$4 = objectProto$6.hasOwnProperty;

/** Built-in value references. */
var propertyIsEnumerable = objectProto$6.propertyIsEnumerable;

/**
 * Checks if `value` is likely an `arguments` object.
 *
 * @static
 * @memberOf _
 * @since 0.1.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is an `arguments` object,
 *  else `false`.
 * @example
 *
 * _.isArguments(function() { return arguments; }());
 * // => true
 *
 * _.isArguments([1, 2, 3]);
 * // => false
 */
var isArguments = _baseIsArguments(function() { return arguments; }()) ? _baseIsArguments : function(value) {
  return isObjectLike_1(value) && hasOwnProperty$4.call(value, 'callee') &&
    !propertyIsEnumerable.call(value, 'callee');
};

var isArguments_1 = isArguments;

/**
 * Checks if `value` is classified as an `Array` object.
 *
 * @static
 * @memberOf _
 * @since 0.1.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is an array, else `false`.
 * @example
 *
 * _.isArray([1, 2, 3]);
 * // => true
 *
 * _.isArray(document.body.children);
 * // => false
 *
 * _.isArray('abc');
 * // => false
 *
 * _.isArray(_.noop);
 * // => false
 */
var isArray = Array.isArray;

var isArray_1 = isArray;

/** Used as references for various `Number` constants. */
var MAX_SAFE_INTEGER = 9007199254740991;

/**
 * Checks if `value` is a valid array-like length.
 *
 * **Note:** This method is loosely based on
 * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
 *
 * @static
 * @memberOf _
 * @since 4.0.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
 * @example
 *
 * _.isLength(3);
 * // => true
 *
 * _.isLength(Number.MIN_VALUE);
 * // => false
 *
 * _.isLength(Infinity);
 * // => false
 *
 * _.isLength('3');
 * // => false
 */
function isLength(value) {
  return typeof value == 'number' &&
    value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
}

var isLength_1 = isLength;

/**
 * Checks if `value` is array-like. A value is considered array-like if it's
 * not a function and has a `value.length` that's an integer greater than or
 * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
 *
 * @static
 * @memberOf _
 * @since 4.0.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
 * @example
 *
 * _.isArrayLike([1, 2, 3]);
 * // => true
 *
 * _.isArrayLike(document.body.children);
 * // => true
 *
 * _.isArrayLike('abc');
 * // => true
 *
 * _.isArrayLike(_.noop);
 * // => false
 */
function isArrayLike(value) {
  return value != null && isLength_1(value.length) && !isFunction_1(value);
}

var isArrayLike_1 = isArrayLike;

/**
 * This method is like `_.isArrayLike` except that it also checks if `value`
 * is an object.
 *
 * @static
 * @memberOf _
 * @since 4.0.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is an array-like object,
 *  else `false`.
 * @example
 *
 * _.isArrayLikeObject([1, 2, 3]);
 * // => true
 *
 * _.isArrayLikeObject(document.body.children);
 * // => true
 *
 * _.isArrayLikeObject('abc');
 * // => false
 *
 * _.isArrayLikeObject(_.noop);
 * // => false
 */
function isArrayLikeObject(value) {
  return isObjectLike_1(value) && isArrayLike_1(value);
}

var isArrayLikeObject_1 = isArrayLikeObject;

/**
 * This method returns `false`.
 *
 * @static
 * @memberOf _
 * @since 4.13.0
 * @category Util
 * @returns {boolean} Returns `false`.
 * @example
 *
 * _.times(2, _.stubFalse);
 * // => [false, false]
 */
function stubFalse() {
  return false;
}

var stubFalse_1 = stubFalse;

var isBuffer_1 = createCommonjsModule(function (module, exports) {
/** Detect free variable `exports`. */
var freeExports = 'object' == 'object' && exports && !exports.nodeType && exports;

/** Detect free variable `module`. */
var freeModule = freeExports && 'object' == 'object' && module && !module.nodeType && module;

/** Detect the popular CommonJS extension `module.exports`. */
var moduleExports = freeModule && freeModule.exports === freeExports;

/** Built-in value references. */
var Buffer = moduleExports ? _root.Buffer : undefined;

/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined;

/**
 * Checks if `value` is a buffer.
 *
 * @static
 * @memberOf _
 * @since 4.3.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.
 * @example
 *
 * _.isBuffer(new Buffer(2));
 * // => true
 *
 * _.isBuffer(new Uint8Array(2));
 * // => false
 */
var isBuffer = nativeIsBuffer || stubFalse_1;

module.exports = isBuffer;
});

/** `Object#toString` result references. */
var objectTag = '[object Object]';

/** Used for built-in method references. */
var funcProto$2 = Function.prototype;
var objectProto$7 = Object.prototype;

/** Used to resolve the decompiled source of functions. */
var funcToString$2 = funcProto$2.toString;

/** Used to check objects for own properties. */
var hasOwnProperty$5 = objectProto$7.hasOwnProperty;

/** Used to infer the `Object` constructor. */
var objectCtorString = funcToString$2.call(Object);

/**
 * Checks if `value` is a plain object, that is, an object created by the
 * `Object` constructor or one with a `[[Prototype]]` of `null`.
 *
 * @static
 * @memberOf _
 * @since 0.8.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
 * @example
 *
 * function Foo() {
 *   this.a = 1;
 * }
 *
 * _.isPlainObject(new Foo);
 * // => false
 *
 * _.isPlainObject([1, 2, 3]);
 * // => false
 *
 * _.isPlainObject({ 'x': 0, 'y': 0 });
 * // => true
 *
 * _.isPlainObject(Object.create(null));
 * // => true
 */
function isPlainObject(value) {
  if (!isObjectLike_1(value) || _baseGetTag(value) != objectTag) {
    return false;
  }
  var proto = _getPrototype(value);
  if (proto === null) {
    return true;
  }
  var Ctor = hasOwnProperty$5.call(proto, 'constructor') && proto.constructor;
  return typeof Ctor == 'function' && Ctor instanceof Ctor &&
    funcToString$2.call(Ctor) == objectCtorString;
}

var isPlainObject_1 = isPlainObject;

/** `Object#toString` result references. */
var argsTag$1 = '[object Arguments]';
var arrayTag = '[object Array]';
var boolTag = '[object Boolean]';
var dateTag = '[object Date]';
var errorTag = '[object Error]';
var funcTag$1 = '[object Function]';
var mapTag = '[object Map]';
var numberTag = '[object Number]';
var objectTag$1 = '[object Object]';
var regexpTag = '[object RegExp]';
var setTag = '[object Set]';
var stringTag = '[object String]';
var weakMapTag = '[object WeakMap]';

var arrayBufferTag = '[object ArrayBuffer]';
var dataViewTag = '[object DataView]';
var float32Tag = '[object Float32Array]';
var float64Tag = '[object Float64Array]';
var int8Tag = '[object Int8Array]';
var int16Tag = '[object Int16Array]';
var int32Tag = '[object Int32Array]';
var uint8Tag = '[object Uint8Array]';
var uint8ClampedTag = '[object Uint8ClampedArray]';
var uint16Tag = '[object Uint16Array]';
var uint32Tag = '[object Uint32Array]';

/** Used to identify `toStringTag` values of typed arrays. */
var typedArrayTags = {};
typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
typedArrayTags[uint32Tag] = true;
typedArrayTags[argsTag$1] = typedArrayTags[arrayTag] =
typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
typedArrayTags[errorTag] = typedArrayTags[funcTag$1] =
typedArrayTags[mapTag] = typedArrayTags[numberTag] =
typedArrayTags[objectTag$1] = typedArrayTags[regexpTag] =
typedArrayTags[setTag] = typedArrayTags[stringTag] =
typedArrayTags[weakMapTag] = false;

/**
 * The base implementation of `_.isTypedArray` without Node.js optimizations.
 *
 * @private
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
 */
function baseIsTypedArray(value) {
  return isObjectLike_1(value) &&
    isLength_1(value.length) && !!typedArrayTags[_baseGetTag(value)];
}

var _baseIsTypedArray = baseIsTypedArray;

/**
 * The base implementation of `_.unary` without support for storing metadata.
 *
 * @private
 * @param {Function} func The function to cap arguments for.
 * @returns {Function} Returns the new capped function.
 */
function baseUnary(func) {
  return function(value) {
    return func(value);
  };
}

var _baseUnary = baseUnary;

var _nodeUtil = createCommonjsModule(function (module, exports) {
/** Detect free variable `exports`. */
var freeExports = 'object' == 'object' && exports && !exports.nodeType && exports;

/** Detect free variable `module`. */
var freeModule = freeExports && 'object' == 'object' && module && !module.nodeType && module;

/** Detect the popular CommonJS extension `module.exports`. */
var moduleExports = freeModule && freeModule.exports === freeExports;

/** Detect free variable `process` from Node.js. */
var freeProcess = moduleExports && _freeGlobal.process;

/** Used to access faster Node.js helpers. */
var nodeUtil = (function() {
  try {
    return freeProcess && freeProcess.binding && freeProcess.binding('util');
  } catch (e) {}
}());

module.exports = nodeUtil;
});

/* Node.js helper references. */
var nodeIsTypedArray = _nodeUtil && _nodeUtil.isTypedArray;

/**
 * Checks if `value` is classified as a typed array.
 *
 * @static
 * @memberOf _
 * @since 3.0.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
 * @example
 *
 * _.isTypedArray(new Uint8Array);
 * // => true
 *
 * _.isTypedArray([]);
 * // => false
 */
var isTypedArray = nodeIsTypedArray ? _baseUnary(nodeIsTypedArray) : _baseIsTypedArray;

var isTypedArray_1 = isTypedArray;

/** Used for built-in method references. */
var objectProto$8 = Object.prototype;

/** Used to check objects for own properties. */
var hasOwnProperty$6 = objectProto$8.hasOwnProperty;

/**
 * Assigns `value` to `key` of `object` if the existing value is not equivalent
 * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
 * for equality comparisons.
 *
 * @private
 * @param {Object} object The object to modify.
 * @param {string} key The key of the property to assign.
 * @param {*} value The value to assign.
 */
function assignValue(object, key, value) {
  var objValue = object[key];
  if (!(hasOwnProperty$6.call(object, key) && eq_1(objValue, value)) ||
      (value === undefined && !(key in object))) {
    _baseAssignValue(object, key, value);
  }
}

var _assignValue = assignValue;

/**
 * Copies properties of `source` to `object`.
 *
 * @private
 * @param {Object} source The object to copy properties from.
 * @param {Array} props The property identifiers to copy.
 * @param {Object} [object={}] The object to copy properties to.
 * @param {Function} [customizer] The function to customize copied values.
 * @returns {Object} Returns `object`.
 */
function copyObject(source, props, object, customizer) {
  var isNew = !object;
  object || (object = {});

  var index = -1,
      length = props.length;

  while (++index < length) {
    var key = props[index];

    var newValue = customizer
      ? customizer(object[key], source[key], key, object, source)
      : undefined;

    if (newValue === undefined) {
      newValue = source[key];
    }
    if (isNew) {
      _baseAssignValue(object, key, newValue);
    } else {
      _assignValue(object, key, newValue);
    }
  }
  return object;
}

var _copyObject = copyObject;

/**
 * The base implementation of `_.times` without support for iteratee shorthands
 * or max array length checks.
 *
 * @private
 * @param {number} n The number of times to invoke `iteratee`.
 * @param {Function} iteratee The function invoked per iteration.
 * @returns {Array} Returns the array of results.
 */
function baseTimes(n, iteratee) {
  var index = -1,
      result = Array(n);

  while (++index < n) {
    result[index] = iteratee(index);
  }
  return result;
}

var _baseTimes = baseTimes;

/** Used as references for various `Number` constants. */
var MAX_SAFE_INTEGER$1 = 9007199254740991;

/** Used to detect unsigned integer values. */
var reIsUint = /^(?:0|[1-9]\d*)$/;

/**
 * Checks if `value` is a valid array-like index.
 *
 * @private
 * @param {*} value The value to check.
 * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
 * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
 */
function isIndex(value, length) {
  length = length == null ? MAX_SAFE_INTEGER$1 : length;
  return !!length &&
    (typeof value == 'number' || reIsUint.test(value)) &&
    (value > -1 && value % 1 == 0 && value < length);
}

var _isIndex = isIndex;

/** Used for built-in method references. */
var objectProto$9 = Object.prototype;

/** Used to check objects for own properties. */
var hasOwnProperty$7 = objectProto$9.hasOwnProperty;

/**
 * Creates an array of the enumerable property names of the array-like `value`.
 *
 * @private
 * @param {*} value The value to query.
 * @param {boolean} inherited Specify returning inherited property names.
 * @returns {Array} Returns the array of property names.
 */
function arrayLikeKeys(value, inherited) {
  var isArr = isArray_1(value),
      isArg = !isArr && isArguments_1(value),
      isBuff = !isArr && !isArg && isBuffer_1(value),
      isType = !isArr && !isArg && !isBuff && isTypedArray_1(value),
      skipIndexes = isArr || isArg || isBuff || isType,
      result = skipIndexes ? _baseTimes(value.length, String) : [],
      length = result.length;

  for (var key in value) {
    if ((inherited || hasOwnProperty$7.call(value, key)) &&
        !(skipIndexes && (
           // Safari 9 has enumerable `arguments.length` in strict mode.
           key == 'length' ||
           // Node.js 0.10 has enumerable non-index properties on buffers.
           (isBuff && (key == 'offset' || key == 'parent')) ||
           // PhantomJS 2 has enumerable non-index properties on typed arrays.
           (isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset')) ||
           // Skip index properties.
           _isIndex(key, length)
        ))) {
      result.push(key);
    }
  }
  return result;
}

var _arrayLikeKeys = arrayLikeKeys;

/**
 * This function is like
 * [`Object.keys`](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
 * except that it includes inherited enumerable properties.
 *
 * @private
 * @param {Object} object The object to query.
 * @returns {Array} Returns the array of property names.
 */
function nativeKeysIn(object) {
  var result = [];
  if (object != null) {
    for (var key in Object(object)) {
      result.push(key);
    }
  }
  return result;
}

var _nativeKeysIn = nativeKeysIn;

/** Used for built-in method references. */
var objectProto$10 = Object.prototype;

/** Used to check objects for own properties. */
var hasOwnProperty$8 = objectProto$10.hasOwnProperty;

/**
 * The base implementation of `_.keysIn` which doesn't treat sparse arrays as dense.
 *
 * @private
 * @param {Object} object The object to query.
 * @returns {Array} Returns the array of property names.
 */
function baseKeysIn(object) {
  if (!isObject_1(object)) {
    return _nativeKeysIn(object);
  }
  var isProto = _isPrototype(object),
      result = [];

  for (var key in object) {
    if (!(key == 'constructor' && (isProto || !hasOwnProperty$8.call(object, key)))) {
      result.push(key);
    }
  }
  return result;
}

var _baseKeysIn = baseKeysIn;

/**
 * Creates an array of the own and inherited enumerable property names of `object`.
 *
 * **Note:** Non-object values are coerced to objects.
 *
 * @static
 * @memberOf _
 * @since 3.0.0
 * @category Object
 * @param {Object} object The object to query.
 * @returns {Array} Returns the array of property names.
 * @example
 *
 * function Foo() {
 *   this.a = 1;
 *   this.b = 2;
 * }
 *
 * Foo.prototype.c = 3;
 *
 * _.keysIn(new Foo);
 * // => ['a', 'b', 'c'] (iteration order is not guaranteed)
 */
function keysIn(object) {
  return isArrayLike_1(object) ? _arrayLikeKeys(object, true) : _baseKeysIn(object);
}

var keysIn_1 = keysIn;

/**
 * Converts `value` to a plain object flattening inherited enumerable string
 * keyed properties of `value` to own properties of the plain object.
 *
 * @static
 * @memberOf _
 * @since 3.0.0
 * @category Lang
 * @param {*} value The value to convert.
 * @returns {Object} Returns the converted plain object.
 * @example
 *
 * function Foo() {
 *   this.b = 2;
 * }
 *
 * Foo.prototype.c = 3;
 *
 * _.assign({ 'a': 1 }, new Foo);
 * // => { 'a': 1, 'b': 2 }
 *
 * _.assign({ 'a': 1 }, _.toPlainObject(new Foo));
 * // => { 'a': 1, 'b': 2, 'c': 3 }
 */
function toPlainObject(value) {
  return _copyObject(value, keysIn_1(value));
}

var toPlainObject_1 = toPlainObject;

/**
 * A specialized version of `baseMerge` for arrays and objects which performs
 * deep merges and tracks traversed objects enabling objects with circular
 * references to be merged.
 *
 * @private
 * @param {Object} object The destination object.
 * @param {Object} source The source object.
 * @param {string} key The key of the value to merge.
 * @param {number} srcIndex The index of `source`.
 * @param {Function} mergeFunc The function to merge values.
 * @param {Function} [customizer] The function to customize assigned values.
 * @param {Object} [stack] Tracks traversed source values and their merged
 *  counterparts.
 */
function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, stack) {
  var objValue = object[key],
      srcValue = source[key],
      stacked = stack.get(srcValue);

  if (stacked) {
    _assignMergeValue(object, key, stacked);
    return;
  }
  var newValue = customizer
    ? customizer(objValue, srcValue, (key + ''), object, source, stack)
    : undefined;

  var isCommon = newValue === undefined;

  if (isCommon) {
    var isArr = isArray_1(srcValue),
        isBuff = !isArr && isBuffer_1(srcValue),
        isTyped = !isArr && !isBuff && isTypedArray_1(srcValue);

    newValue = srcValue;
    if (isArr || isBuff || isTyped) {
      if (isArray_1(objValue)) {
        newValue = objValue;
      }
      else if (isArrayLikeObject_1(objValue)) {
        newValue = _copyArray(objValue);
      }
      else if (isBuff) {
        isCommon = false;
        newValue = _cloneBuffer(srcValue, true);
      }
      else if (isTyped) {
        isCommon = false;
        newValue = _cloneTypedArray(srcValue, true);
      }
      else {
        newValue = [];
      }
    }
    else if (isPlainObject_1(srcValue) || isArguments_1(srcValue)) {
      newValue = objValue;
      if (isArguments_1(objValue)) {
        newValue = toPlainObject_1(objValue);
      }
      else if (!isObject_1(objValue) || (srcIndex && isFunction_1(objValue))) {
        newValue = _initCloneObject(srcValue);
      }
    }
    else {
      isCommon = false;
    }
  }
  if (isCommon) {
    // Recursively merge objects and arrays (susceptible to call stack limits).
    stack.set(srcValue, newValue);
    mergeFunc(newValue, srcValue, srcIndex, customizer, stack);
    stack['delete'](srcValue);
  }
  _assignMergeValue(object, key, newValue);
}

var _baseMergeDeep = baseMergeDeep;

/**
 * The base implementation of `_.merge` without support for multiple sources.
 *
 * @private
 * @param {Object} object The destination object.
 * @param {Object} source The source object.
 * @param {number} srcIndex The index of `source`.
 * @param {Function} [customizer] The function to customize merged values.
 * @param {Object} [stack] Tracks traversed source values and their merged
 *  counterparts.
 */
function baseMerge(object, source, srcIndex, customizer, stack) {
  if (object === source) {
    return;
  }
  _baseFor(source, function(srcValue, key) {
    if (isObject_1(srcValue)) {
      stack || (stack = new _Stack);
      _baseMergeDeep(object, source, key, srcIndex, baseMerge, customizer, stack);
    }
    else {
      var newValue = customizer
        ? customizer(object[key], srcValue, (key + ''), object, source, stack)
        : undefined;

      if (newValue === undefined) {
        newValue = srcValue;
      }
      _assignMergeValue(object, key, newValue);
    }
  }, keysIn_1);
}

var _baseMerge = baseMerge;

/**
 * This method returns the first argument it receives.
 *
 * @static
 * @since 0.1.0
 * @memberOf _
 * @category Util
 * @param {*} value Any value.
 * @returns {*} Returns `value`.
 * @example
 *
 * var object = { 'a': 1 };
 *
 * console.log(_.identity(object) === object);
 * // => true
 */
function identity(value) {
  return value;
}

var identity_1 = identity;

/**
 * A faster alternative to `Function#apply`, this function invokes `func`
 * with the `this` binding of `thisArg` and the arguments of `args`.
 *
 * @private
 * @param {Function} func The function to invoke.
 * @param {*} thisArg The `this` binding of `func`.
 * @param {Array} args The arguments to invoke `func` with.
 * @returns {*} Returns the result of `func`.
 */
function apply(func, thisArg, args) {
  switch (args.length) {
    case 0: return func.call(thisArg);
    case 1: return func.call(thisArg, args[0]);
    case 2: return func.call(thisArg, args[0], args[1]);
    case 3: return func.call(thisArg, args[0], args[1], args[2]);
  }
  return func.apply(thisArg, args);
}

var _apply = apply;

/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeMax = Math.max;

/**
 * A specialized version of `baseRest` which transforms the rest array.
 *
 * @private
 * @param {Function} func The function to apply a rest parameter to.
 * @param {number} [start=func.length-1] The start position of the rest parameter.
 * @param {Function} transform The rest array transform.
 * @returns {Function} Returns the new function.
 */
function overRest(func, start, transform) {
  start = nativeMax(start === undefined ? (func.length - 1) : start, 0);
  return function() {
    var args = arguments,
        index = -1,
        length = nativeMax(args.length - start, 0),
        array = Array(length);

    while (++index < length) {
      array[index] = args[start + index];
    }
    index = -1;
    var otherArgs = Array(start + 1);
    while (++index < start) {
      otherArgs[index] = args[index];
    }
    otherArgs[start] = transform(array);
    return _apply(func, this, otherArgs);
  };
}

var _overRest = overRest;

/**
 * Creates a function that returns `value`.
 *
 * @static
 * @memberOf _
 * @since 2.4.0
 * @category Util
 * @param {*} value The value to return from the new function.
 * @returns {Function} Returns the new constant function.
 * @example
 *
 * var objects = _.times(2, _.constant({ 'a': 1 }));
 *
 * console.log(objects);
 * // => [{ 'a': 1 }, { 'a': 1 }]
 *
 * console.log(objects[0] === objects[1]);
 * // => true
 */
function constant(value) {
  return function() {
    return value;
  };
}

var constant_1 = constant;

/**
 * The base implementation of `setToString` without support for hot loop shorting.
 *
 * @private
 * @param {Function} func The function to modify.
 * @param {Function} string The `toString` result.
 * @returns {Function} Returns `func`.
 */
var baseSetToString = !_defineProperty$1 ? identity_1 : function(func, string) {
  return _defineProperty$1(func, 'toString', {
    'configurable': true,
    'enumerable': false,
    'value': constant_1(string),
    'writable': true
  });
};

var _baseSetToString = baseSetToString;

/** Used to detect hot functions by number of calls within a span of milliseconds. */
var HOT_COUNT = 800;
var HOT_SPAN = 16;

/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeNow = Date.now;

/**
 * Creates a function that'll short out and invoke `identity` instead
 * of `func` when it's called `HOT_COUNT` or more times in `HOT_SPAN`
 * milliseconds.
 *
 * @private
 * @param {Function} func The function to restrict.
 * @returns {Function} Returns the new shortable function.
 */
function shortOut(func) {
  var count = 0,
      lastCalled = 0;

  return function() {
    var stamp = nativeNow(),
        remaining = HOT_SPAN - (stamp - lastCalled);

    lastCalled = stamp;
    if (remaining > 0) {
      if (++count >= HOT_COUNT) {
        return arguments[0];
      }
    } else {
      count = 0;
    }
    return func.apply(undefined, arguments);
  };
}

var _shortOut = shortOut;

/**
 * Sets the `toString` method of `func` to return `string`.
 *
 * @private
 * @param {Function} func The function to modify.
 * @param {Function} string The `toString` result.
 * @returns {Function} Returns `func`.
 */
var setToString = _shortOut(_baseSetToString);

var _setToString = setToString;

/**
 * The base implementation of `_.rest` which doesn't validate or coerce arguments.
 *
 * @private
 * @param {Function} func The function to apply a rest parameter to.
 * @param {number} [start=func.length-1] The start position of the rest parameter.
 * @returns {Function} Returns the new function.
 */
function baseRest(func, start) {
  return _setToString(_overRest(func, start, identity_1), func + '');
}

var _baseRest = baseRest;

/**
 * Checks if the given arguments are from an iteratee call.
 *
 * @private
 * @param {*} value The potential iteratee value argument.
 * @param {*} index The potential iteratee index or key argument.
 * @param {*} object The potential iteratee object argument.
 * @returns {boolean} Returns `true` if the arguments are from an iteratee call,
 *  else `false`.
 */
function isIterateeCall(value, index, object) {
  if (!isObject_1(object)) {
    return false;
  }
  var type = typeof index;
  if (type == 'number'
        ? (isArrayLike_1(object) && _isIndex(index, object.length))
        : (type == 'string' && index in object)
      ) {
    return eq_1(object[index], value);
  }
  return false;
}

var _isIterateeCall = isIterateeCall;

/**
 * Creates a function like `_.assign`.
 *
 * @private
 * @param {Function} assigner The function to assign values.
 * @returns {Function} Returns the new assigner function.
 */
function createAssigner(assigner) {
  return _baseRest(function(object, sources) {
    var index = -1,
        length = sources.length,
        customizer = length > 1 ? sources[length - 1] : undefined,
        guard = length > 2 ? sources[2] : undefined;

    customizer = (assigner.length > 3 && typeof customizer == 'function')
      ? (length--, customizer)
      : undefined;

    if (guard && _isIterateeCall(sources[0], sources[1], guard)) {
      customizer = length < 3 ? undefined : customizer;
      length = 1;
    }
    object = Object(object);
    while (++index < length) {
      var source = sources[index];
      if (source) {
        assigner(object, source, index, customizer);
      }
    }
    return object;
  });
}

var _createAssigner = createAssigner;

/**
 * This method is like `_.assign` except that it recursively merges own and
 * inherited enumerable string keyed properties of source objects into the
 * destination object. Source properties that resolve to `undefined` are
 * skipped if a destination value exists. Array and plain object properties
 * are merged recursively. Other objects and value types are overridden by
 * assignment. Source objects are applied from left to right. Subsequent
 * sources overwrite property assignments of previous sources.
 *
 * **Note:** This method mutates `object`.
 *
 * @static
 * @memberOf _
 * @since 0.5.0
 * @category Object
 * @param {Object} object The destination object.
 * @param {...Object} [sources] The source objects.
 * @returns {Object} Returns `object`.
 * @example
 *
 * var object = {
 *   'a': [{ 'b': 2 }, { 'd': 4 }]
 * };
 *
 * var other = {
 *   'a': [{ 'c': 3 }, { 'e': 5 }]
 * };
 *
 * _.merge(object, other);
 * // => { 'a': [{ 'b': 2, 'c': 3 }, { 'd': 4, 'e': 5 }] }
 */
var merge = _createAssigner(function(object, source, srcIndex) {
  _baseMerge(object, source, srcIndex);
});

var merge_1$1 = merge;

// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.


// If obj.hasOwnProperty has been overridden, then calling
// obj.hasOwnProperty(prop) will break.
// See: https://github.com/joyent/node/issues/1707
function hasOwnProperty$9(obj, prop) {
  return Object.prototype.hasOwnProperty.call(obj, prop);
}
var isArray$2 = Array.isArray || function (xs) {
  return Object.prototype.toString.call(xs) === '[object Array]';
};
function stringifyPrimitive(v) {
  switch (typeof v) {
    case 'string':
      return v;

    case 'boolean':
      return v ? 'true' : 'false';

    case 'number':
      return isFinite(v) ? v : '';

    default:
      return '';
  }
}

function stringify (obj, sep, eq, name) {
  sep = sep || '&';
  eq = eq || '=';
  if (obj === null) {
    obj = undefined;
  }

  if (typeof obj === 'object') {
    return map(objectKeys(obj), function(k) {
      var ks = encodeURIComponent(stringifyPrimitive(k)) + eq;
      if (isArray$2(obj[k])) {
        return map(obj[k], function(v) {
          return ks + encodeURIComponent(stringifyPrimitive(v));
        }).join(sep);
      } else {
        return ks + encodeURIComponent(stringifyPrimitive(obj[k]));
      }
    }).join(sep);

  }

  if (!name) return '';
  return encodeURIComponent(stringifyPrimitive(name)) + eq +
         encodeURIComponent(stringifyPrimitive(obj));
}

function map (xs, f) {
  if (xs.map) return xs.map(f);
  var res = [];
  for (var i = 0; i < xs.length; i++) {
    res.push(f(xs[i], i));
  }
  return res;
}

var objectKeys = Object.keys || function (obj) {
  var res = [];
  for (var key in obj) {
    if (Object.prototype.hasOwnProperty.call(obj, key)) res.push(key);
  }
  return res;
};

function parse$2(qs, sep, eq, options) {
  sep = sep || '&';
  eq = eq || '=';
  var obj = {};

  if (typeof qs !== 'string' || qs.length === 0) {
    return obj;
  }

  var regexp = /\+/g;
  qs = qs.split(sep);

  var maxKeys = 1000;
  if (options && typeof options.maxKeys === 'number') {
    maxKeys = options.maxKeys;
  }

  var len = qs.length;
  // maxKeys <= 0 means that we should not limit keys count
  if (maxKeys > 0 && len > maxKeys) {
    len = maxKeys;
  }

  for (var i = 0; i < len; ++i) {
    var x = qs[i].replace(regexp, '%20'),
        idx = x.indexOf(eq),
        kstr, vstr, k, v;

    if (idx >= 0) {
      kstr = x.substr(0, idx);
      vstr = x.substr(idx + 1);
    } else {
      kstr = x;
      vstr = '';
    }

    k = decodeURIComponent(kstr);
    v = decodeURIComponent(vstr);

    if (!hasOwnProperty$9(obj, k)) {
      obj[k] = v;
    } else if (isArray$2(obj[k])) {
      obj[k].push(v);
    } else {
      obj[k] = [obj[k], v];
    }
  }

  return obj;
}
var querystring = {
  encode: stringify,
  stringify: stringify,
  decode: parse$2,
  parse: parse$2
};

/*
 * Simple AJAX request object
 */
var Request = function Request(url, data) {
  this.url = url;
  this.data = data || {};
};

Request.prototype.send = function (callback) {
  var isIE = window.XDomainRequest ? true : false;
  if (isIE) {
    var xdr = new window.XDomainRequest();
    xdr.open('POST', this.url, true);
    xdr.onload = function () {
      callback(200, xdr.responseText);
    };
    xdr.onerror = function () {
      // status code not available from xdr, try string matching on responseText
      if (xdr.responseText === 'Request Entity Too Large') {
        callback(413, xdr.responseText);
      } else {
        callback(500, xdr.responseText);
      }
    };
    xdr.ontimeout = function () {};
    xdr.onprogress = function () {};
    xdr.send(querystring.stringify(this.data));
  } else {
    var xhr = new XMLHttpRequest();
    xhr.open('POST', this.url, true);
    xhr.onreadystatechange = function () {
      if (xhr.readyState === 4) {
        callback(xhr.status, xhr.responseText);
      }
    };
    xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded; charset=UTF-8');
    xhr.send(querystring.stringify(this.data));
  }
  //log('sent request to ' + this.url + ' with data ' + decodeURIComponent(queryString(this.data)));
};

/*
 * Wrapper for logging Revenue data. Revenue objects get passed to amplitude.logRevenueV2 to send to Amplitude servers.
 * Note: price is the only required field. If quantity is not specified, then defaults to 1.
 */

/**
 * Revenue API - instance constructor. Revenue objects are a wrapper for revenue data.
 * Each method updates a revenue property in the Revenue object, and returns the same Revenue object,
 * allowing you to chain multiple method calls together.
 * Note: price is a required field to log revenue events.
 * If quantity is not specified then defaults to 1.
 * See [Readme]{@link https://github.com/amplitude/Amplitude-Javascript#tracking-revenue} for more information
 * about logging Revenue.
 * @constructor Revenue
 * @public
 * @example var revenue = new amplitude.Revenue();
 */
var Revenue = function Revenue() {
  // required fields
  this._price = null;

  // optional fields
  this._productId = null;
  this._quantity = 1;
  this._revenueType = null;
  this._properties = null;
};

/**
 * Set a value for the product identifer.
 * @public
 * @param {string} productId - The value for the product identifier. Empty and invalid strings are ignored.
 * @return {Revenue} Returns the same Revenue object, allowing you to chain multiple method calls together.
 * @example var revenue = new amplitude.Revenue().setProductId('productIdentifier').setPrice(10.99);
 * amplitude.logRevenueV2(revenue);
 */
Revenue.prototype.setProductId = function setProductId(productId) {
  if (type(productId) !== 'string') {
    utils.log.error('Unsupported type for productId: ' + type(productId) + ', expecting string');
  } else if (utils.isEmptyString(productId)) {
    utils.log.error('Invalid empty productId');
  } else {
    this._productId = productId;
  }
  return this;
};

/**
 * Set a value for the quantity. Note revenue amount is calculated as price * quantity.
 * @public
 * @param {number} quantity - Integer value for the quantity. If not set, quantity defaults to 1.
 * @return {Revenue} Returns the same Revenue object, allowing you to chain multiple method calls together.
 * @example var revenue = new amplitude.Revenue().setProductId('productIdentifier').setPrice(10.99).setQuantity(5);
 * amplitude.logRevenueV2(revenue);
 */
Revenue.prototype.setQuantity = function setQuantity(quantity) {
  if (type(quantity) !== 'number') {
    utils.log.error('Unsupported type for quantity: ' + type(quantity) + ', expecting number');
  } else {
    this._quantity = parseInt(quantity);
  }
  return this;
};

/**
 * Set a value for the price. This field is required for all revenue being logged.
 * Note revenue amount is calculated as price * quantity.
 * @public
 * @param {number} price - Double value for the quantity.
 * @return {Revenue} Returns the same Revenue object, allowing you to chain multiple method calls together.
 * @example var revenue = new amplitude.Revenue().setProductId('productIdentifier').setPrice(10.99);
 * amplitude.logRevenueV2(revenue);
 */
Revenue.prototype.setPrice = function setPrice(price) {
  if (type(price) !== 'number') {
    utils.log.error('Unsupported type for price: ' + type(price) + ', expecting number');
  } else {
    this._price = price;
  }
  return this;
};

/**
 * Set a value for the revenueType (for example purchase, cost, tax, refund, etc).
 * @public
 * @param {string} revenueType - RevenueType to designate.
 * @return {Revenue} Returns the same Revenue object, allowing you to chain multiple method calls together.
 * @example var revenue = new amplitude.Revenue().setProductId('productIdentifier').setPrice(10.99).setRevenueType('purchase');
 * amplitude.logRevenueV2(revenue);
 */
Revenue.prototype.setRevenueType = function setRevenueType(revenueType) {
  if (type(revenueType) !== 'string') {
    utils.log.error('Unsupported type for revenueType: ' + type(revenueType) + ', expecting string');
  } else {
    this._revenueType = revenueType;
  }
  return this;
};

/**
 * Set event properties for the revenue event.
 * @public
 * @param {object} eventProperties - Revenue event properties to set.
 * @return {Revenue} Returns the same Revenue object, allowing you to chain multiple method calls together.
 * @example var event_properties = {'city': 'San Francisco'};
 * var revenue = new amplitude.Revenue().setProductId('productIdentifier').setPrice(10.99).setEventProperties(event_properties);
 * amplitude.logRevenueV2(revenue);
*/
Revenue.prototype.setEventProperties = function setEventProperties(eventProperties) {
  if (type(eventProperties) !== 'object') {
    utils.log.error('Unsupported type for eventProperties: ' + type(eventProperties) + ', expecting object');
  } else {
    this._properties = utils.validateProperties(eventProperties);
  }
  return this;
};

/**
 * @private
 */
Revenue.prototype._isValidRevenue = function _isValidRevenue() {
  if (type(this._price) !== 'number') {
    utils.log.error('Invalid revenue, need to set price field');
    return false;
  }
  return true;
};

/**
 * @private
 */
Revenue.prototype._toJSONObject = function _toJSONObject() {
  var obj = type(this._properties) === 'object' ? this._properties : {};

  if (this._productId !== null) {
    obj[constants.REVENUE_PRODUCT_ID] = this._productId;
  }
  if (this._quantity !== null) {
    obj[constants.REVENUE_QUANTITY] = this._quantity;
  }
  if (this._price !== null) {
    obj[constants.REVENUE_PRICE] = this._price;
  }
  if (this._revenueType !== null) {
    obj[constants.REVENUE_REVENUE_TYPE] = this._revenueType;
  }
  return obj;
};

var uaParser = createCommonjsModule(function (module, exports) {
/* jshint eqeqeq: false, forin: false */
/* global define */

/**
 * UAParser.js v0.7.10
 * Lightweight JavaScript-based User-Agent string parser
 * https://github.com/faisalman/ua-parser-js
 *
 * Copyright © 2012-2015 Faisal Salman <fyzlman@gmail.com>
 * Dual licensed under GPLv2 & MIT
 */

(function (window, undefined) {

    'use strict';

    //////////////
    // Constants
    /////////////


    var LIBVERSION  = '0.7.10',
        EMPTY       = '',
        UNKNOWN     = '?',
        FUNC_TYPE   = 'function',
        UNDEF_TYPE  = 'undefined',
        OBJ_TYPE    = 'object',
        STR_TYPE    = 'string',
        MAJOR       = 'major', // deprecated
        MODEL       = 'model',
        NAME        = 'name',
        TYPE        = 'type',
        VENDOR      = 'vendor',
        VERSION     = 'version',
        ARCHITECTURE= 'architecture',
        CONSOLE     = 'console',
        MOBILE      = 'mobile',
        TABLET      = 'tablet',
        SMARTTV     = 'smarttv',
        WEARABLE    = 'wearable',
        EMBEDDED    = 'embedded';


    ///////////
    // Helper
    //////////


    var util = {
        extend : function (regexes, extensions) {
            var margedRegexes = {};
            for (var i in regexes) {
                if (extensions[i] && extensions[i].length % 2 === 0) {
                    margedRegexes[i] = extensions[i].concat(regexes[i]);
                } else {
                    margedRegexes[i] = regexes[i];
                }
            }
            return margedRegexes;
        },
        has : function (str1, str2) {
          if (typeof str1 === "string") {
            return str2.toLowerCase().indexOf(str1.toLowerCase()) !== -1;
          } else {
            return false;
          }
        },
        lowerize : function (str) {
            return str.toLowerCase();
        },
        major : function (version) {
            return typeof(version) === STR_TYPE ? version.split(".")[0] : undefined;
        }
    };


    ///////////////
    // Map helper
    //////////////


    var mapper = {

        rgx : function () {

            var result, i = 0, j, k, p, q, matches, match, args = arguments;

            // loop through all regexes maps
            while (i < args.length && !matches) {

                var regex = args[i],       // even sequence (0,2,4,..)
                    props = args[i + 1];   // odd sequence (1,3,5,..)

                // construct object barebones
                if (typeof result === UNDEF_TYPE) {
                    result = {};
                    for (p in props) {
                        if (props.hasOwnProperty(p)){
                            q = props[p];
                            if (typeof q === OBJ_TYPE) {
                                result[q[0]] = undefined;
                            } else {
                                result[q] = undefined;
                            }
                        }
                    }
                }

                // try matching uastring with regexes
                j = k = 0;
                while (j < regex.length && !matches) {
                    matches = regex[j++].exec(this.getUA());
                    if (!!matches) {
                        for (p = 0; p < props.length; p++) {
                            match = matches[++k];
                            q = props[p];
                            // check if given property is actually array
                            if (typeof q === OBJ_TYPE && q.length > 0) {
                                if (q.length == 2) {
                                    if (typeof q[1] == FUNC_TYPE) {
                                        // assign modified match
                                        result[q[0]] = q[1].call(this, match);
                                    } else {
                                        // assign given value, ignore regex match
                                        result[q[0]] = q[1];
                                    }
                                } else if (q.length == 3) {
                                    // check whether function or regex
                                    if (typeof q[1] === FUNC_TYPE && !(q[1].exec && q[1].test)) {
                                        // call function (usually string mapper)
                                        result[q[0]] = match ? q[1].call(this, match, q[2]) : undefined;
                                    } else {
                                        // sanitize match using given regex
                                        result[q[0]] = match ? match.replace(q[1], q[2]) : undefined;
                                    }
                                } else if (q.length == 4) {
                                        result[q[0]] = match ? q[3].call(this, match.replace(q[1], q[2])) : undefined;
                                }
                            } else {
                                result[q] = match ? match : undefined;
                            }
                        }
                    }
                }
                i += 2;
            }
            return result;
        },

        str : function (str, map) {

            for (var i in map) {
                // check if array
                if (typeof map[i] === OBJ_TYPE && map[i].length > 0) {
                    for (var j = 0; j < map[i].length; j++) {
                        if (util.has(map[i][j], str)) {
                            return (i === UNKNOWN) ? undefined : i;
                        }
                    }
                } else if (util.has(map[i], str)) {
                    return (i === UNKNOWN) ? undefined : i;
                }
            }
            return str;
        }
    };


    ///////////////
    // String map
    //////////////


    var maps = {

        browser : {
            oldsafari : {
                version : {
                    '1.0'   : '/8',
                    '1.2'   : '/1',
                    '1.3'   : '/3',
                    '2.0'   : '/412',
                    '2.0.2' : '/416',
                    '2.0.3' : '/417',
                    '2.0.4' : '/419',
                    '?'     : '/'
                }
            },
            name : {
                'Opera Mobile' : 'Opera Mobi',
                'IE Mobile'    : 'IEMobile'
            }
        },

        device : {
            amazon : {
                model : {
                    'Fire Phone' : ['SD', 'KF']
                }
            },
            sprint : {
                model : {
                    'Evo Shift 4G' : '7373KT'
                },
                vendor : {
                    'HTC'       : 'APA',
                    'Sprint'    : 'Sprint'
                }
            }
        },

        os : {
            windows : {
                version : {
                    'ME'        : '4.90',
                    'NT 3.11'   : 'NT3.51',
                    'NT 4.0'    : 'NT4.0',
                    '2000'      : 'NT 5.0',
                    'XP'        : ['NT 5.1', 'NT 5.2'],
                    'Vista'     : 'NT 6.0',
                    '7'         : 'NT 6.1',
                    '8'         : 'NT 6.2',
                    '8.1'       : 'NT 6.3',
                    '10'        : ['NT 6.4', 'NT 10.0'],
                    'RT'        : 'ARM'
                },
                name : {
                    'Windows Phone' : 'Windows Phone OS',
                }
            }
        }
    };


    //////////////
    // Regex map
    /////////////


    var regexes = {

        browser : [[

            // Presto based
            /(opera\smini)\/([\w\.-]+)/i,                                       // Opera Mini
            /(opera\s[mobiletab]+).+version\/([\w\.-]+)/i,                      // Opera Mobi/Tablet
            /(opera).+version\/([\w\.]+)/i,                                     // Opera > 9.80
            /(opera)[\/\s]+([\w\.]+)/i                                          // Opera < 9.80
            ], [NAME, VERSION], [

            /(OPiOS)[\/\s]+([\w\.]+)/i                                          // Opera mini on iphone >= 8.0
            ], [[NAME, 'Opera Mini'], VERSION], [

            /\s(opr)\/([\w\.]+)/i                                               // Opera Webkit
            ], [[NAME, 'Opera'], VERSION], [

            // Mixed
            /(kindle)\/([\w\.]+)/i,                                             // Kindle
            /(lunascape|maxthon|netfront|jasmine|blazer)[\/\s]?([\w\.]+)*/i,
                                                                                // Lunascape/Maxthon/Netfront/Jasmine/Blazer

            // Trident based
            /(avant\s|iemobile|slim|baidu)(?:browser)?[\/\s]?([\w\.]*)/i,
                                                                                // Avant/IEMobile/SlimBrowser/Baidu
            /(?:ms|\()(ie)\s([\w\.]+)/i,                                        // Internet Explorer

            // Webkit/KHTML based
            /(rekonq)\/([\w\.]+)*/i,                                            // Rekonq
            /(chromium|flock|rockmelt|midori|epiphany|silk|skyfire|ovibrowser|bolt|iron|vivaldi|iridium|phantomjs)\/([\w\.-]+)/i
                                                                                // Chromium/Flock/RockMelt/Midori/Epiphany/Silk/Skyfire/Bolt/Iron/Iridium/PhantomJS
            ], [NAME, VERSION], [

            /(trident).+rv[:\s]([\w\.]+).+like\sgecko/i                         // IE11
            ], [[NAME, 'IE'], VERSION], [

            /(edge)\/((\d+)?[\w\.]+)/i                                          // Microsoft Edge
            ], [NAME, VERSION], [

            /(yabrowser)\/([\w\.]+)/i                                           // Yandex
            ], [[NAME, 'Yandex'], VERSION], [

            /(comodo_dragon)\/([\w\.]+)/i                                       // Comodo Dragon
            ], [[NAME, /_/g, ' '], VERSION], [

            /((?:android.+)crmo|crios)\/([\w\.]+)/i,
            /android.+(chrome)\/([\w\.]+)\s+(?:mobile\s?safari)/i               // Chrome for Android/iOS
            ], [[NAME, 'Chrome Mobile'], VERSION], [

            /(chrome|omniweb|arora|[tizenoka]{5}\s?browser)\/v?([\w\.]+)/i,
                                                                                // Chrome/OmniWeb/Arora/Tizen/Nokia
            /(qqbrowser)[\/\s]?([\w\.]+)/i
                                                                                // QQBrowser
            ], [NAME, VERSION], [

            /(uc\s?browser)[\/\s]?([\w\.]+)/i,
            /ucweb.+(ucbrowser)[\/\s]?([\w\.]+)/i,
            /JUC.+(ucweb)[\/\s]?([\w\.]+)/i
                                                                                // UCBrowser
            ], [[NAME, 'UCBrowser'], VERSION], [

            /(dolfin)\/([\w\.]+)/i                                              // Dolphin
            ], [[NAME, 'Dolphin'], VERSION], [

            /XiaoMi\/MiuiBrowser\/([\w\.]+)/i                                   // MIUI Browser
            ], [VERSION, [NAME, 'MIUI Browser']], [

            /android.+version\/([\w\.]+)\s+(?:mobile\s?safari|safari)/i         // Android Browser
            ], [VERSION, [NAME, 'Android Browser']], [

            /FBAV\/([\w\.]+);/i                                                 // Facebook App for iOS
            ], [VERSION, [NAME, 'Facebook']], [

            /fxios\/([\w\.-]+)/i                                                // Firefox for iOS
            ], [VERSION, [NAME, 'Firefox']], [

            /version\/([\w\.]+).+?mobile\/\w+\s(safari)/i                       // Mobile Safari
            ], [VERSION, [NAME, 'Mobile Safari']], [

            /version\/([\w\.]+).+?(mobile\s?safari|safari)/i                    // Safari & Safari Mobile
            ], [VERSION, NAME], [

            /webkit.+?(mobile\s?safari|safari)(\/[\w\.]+)/i                     // Safari < 3.0
            ], [NAME, [VERSION, mapper.str, maps.browser.oldsafari.version]], [

            /(konqueror)\/([\w\.]+)/i,                                          // Konqueror
            /(webkit|khtml)\/([\w\.]+)/i
            ], [NAME, VERSION], [

            /(blackberry)\\s?\/([\w\.]+)/i                                      // Blackberry
            ], [[NAME, "BlackBerry"], VERSION], [

            // Gecko based
            /(navigator|netscape)\/([\w\.-]+)/i                                 // Netscape
            ], [[NAME, 'Netscape'], VERSION], [
            /(swiftfox)/i,                                                      // Swiftfox
            /(icedragon|iceweasel|camino|chimera|fennec|maemo\sbrowser|minimo|conkeror)[\/\s]?([\w\.\+]+)/i,
                                                                                // IceDragon/Iceweasel/Camino/Chimera/Fennec/Maemo/Minimo/Conkeror
            /(firefox|seamonkey|k-meleon|icecat|iceape|firebird|phoenix)\/([\w\.-]+)/i,
                                                                                // Firefox/SeaMonkey/K-Meleon/IceCat/IceApe/Firebird/Phoenix
            /(mozilla)\/([\w\.]+).+rv\:.+gecko\/\d+/i,                          // Mozilla

            // Other
            /(polaris|lynx|dillo|icab|doris|amaya|w3m|netsurf|sleipnir)[\/\s]?([\w\.]+)/i,
                                                                                // Polaris/Lynx/Dillo/iCab/Doris/Amaya/w3m/NetSurf/Sleipnir
            /(links)\s\(([\w\.]+)/i,                                            // Links
            /(gobrowser)\/?([\w\.]+)*/i,                                        // GoBrowser
            /(ice\s?browser)\/v?([\w\._]+)/i,                                   // ICE Browser
            /(mosaic)[\/\s]([\w\.]+)/i                                          // Mosaic
            ], [NAME, VERSION]

            /* /////////////////////
            // Media players BEGIN
            ////////////////////////

            , [

            /(apple(?:coremedia|))\/((\d+)[\w\._]+)/i,                          // Generic Apple CoreMedia
            /(coremedia) v((\d+)[\w\._]+)/i
            ], [NAME, VERSION], [

            /(aqualung|lyssna|bsplayer)\/((\d+)?[\w\.-]+)/i                     // Aqualung/Lyssna/BSPlayer
            ], [NAME, VERSION], [

            /(ares|ossproxy)\s((\d+)[\w\.-]+)/i                                 // Ares/OSSProxy
            ], [NAME, VERSION], [

            /(audacious|audimusicstream|amarok|bass|core|dalvik|gnomemplayer|music on console|nsplayer|psp-internetradioplayer|videos)\/((\d+)[\w\.-]+)/i,
                                                                                // Audacious/AudiMusicStream/Amarok/BASS/OpenCORE/Dalvik/GnomeMplayer/MoC
                                                                                // NSPlayer/PSP-InternetRadioPlayer/Videos
            /(clementine|music player daemon)\s((\d+)[\w\.-]+)/i,               // Clementine/MPD
            /(lg player|nexplayer)\s((\d+)[\d\.]+)/i,
            /player\/(nexplayer|lg player)\s((\d+)[\w\.-]+)/i                   // NexPlayer/LG Player
            ], [NAME, VERSION], [
            /(nexplayer)\s((\d+)[\w\.-]+)/i                                     // Nexplayer
            ], [NAME, VERSION], [

            /(flrp)\/((\d+)[\w\.-]+)/i                                          // Flip Player
            ], [[NAME, 'Flip Player'], VERSION], [

            /(fstream|nativehost|queryseekspider|ia-archiver|facebookexternalhit)/i
                                                                                // FStream/NativeHost/QuerySeekSpider/IA Archiver/facebookexternalhit
            ], [NAME], [

            /(gstreamer) souphttpsrc (?:\([^\)]+\)){0,1} libsoup\/((\d+)[\w\.-]+)/i
                                                                                // Gstreamer
            ], [NAME, VERSION], [

            /(htc streaming player)\s[\w_]+\s\/\s((\d+)[\d\.]+)/i,              // HTC Streaming Player
            /(java|python-urllib|python-requests|wget|libcurl)\/((\d+)[\w\.-_]+)/i,
                                                                                // Java/urllib/requests/wget/cURL
            /(lavf)((\d+)[\d\.]+)/i                                             // Lavf (FFMPEG)
            ], [NAME, VERSION], [

            /(htc_one_s)\/((\d+)[\d\.]+)/i                                      // HTC One S
            ], [[NAME, /_/g, ' '], VERSION], [

            /(mplayer)(?:\s|\/)(?:(?:sherpya-){0,1}svn)(?:-|\s)(r\d+(?:-\d+[\w\.-]+){0,1})/i
                                                                                // MPlayer SVN
            ], [NAME, VERSION], [

            /(mplayer)(?:\s|\/|[unkow-]+)((\d+)[\w\.-]+)/i                      // MPlayer
            ], [NAME, VERSION], [

            /(mplayer)/i,                                                       // MPlayer (no other info)
            /(yourmuze)/i,                                                      // YourMuze
            /(media player classic|nero showtime)/i                             // Media Player Classic/Nero ShowTime
            ], [NAME], [

            /(nero (?:home|scout))\/((\d+)[\w\.-]+)/i                           // Nero Home/Nero Scout
            ], [NAME, VERSION], [

            /(nokia\d+)\/((\d+)[\w\.-]+)/i                                      // Nokia
            ], [NAME, VERSION], [

            /\s(songbird)\/((\d+)[\w\.-]+)/i                                    // Songbird/Philips-Songbird
            ], [NAME, VERSION], [

            /(winamp)3 version ((\d+)[\w\.-]+)/i,                               // Winamp
            /(winamp)\s((\d+)[\w\.-]+)/i,
            /(winamp)mpeg\/((\d+)[\w\.-]+)/i
            ], [NAME, VERSION], [

            /(ocms-bot|tapinradio|tunein radio|unknown|winamp|inlight radio)/i  // OCMS-bot/tap in radio/tunein/unknown/winamp (no other info)
                                                                                // inlight radio
            ], [NAME], [

            /(quicktime|rma|radioapp|radioclientapplication|soundtap|totem|stagefright|streamium)\/((\d+)[\w\.-]+)/i
                                                                                // QuickTime/RealMedia/RadioApp/RadioClientApplication/
                                                                                // SoundTap/Totem/Stagefright/Streamium
            ], [NAME, VERSION], [

            /(smp)((\d+)[\d\.]+)/i                                              // SMP
            ], [NAME, VERSION], [

            /(vlc) media player - version ((\d+)[\w\.]+)/i,                     // VLC Videolan
            /(vlc)\/((\d+)[\w\.-]+)/i,
            /(xbmc|gvfs|xine|xmms|irapp)\/((\d+)[\w\.-]+)/i,                    // XBMC/gvfs/Xine/XMMS/irapp
            /(foobar2000)\/((\d+)[\d\.]+)/i,                                    // Foobar2000
            /(itunes)\/((\d+)[\d\.]+)/i                                         // iTunes
            ], [NAME, VERSION], [

            /(wmplayer)\/((\d+)[\w\.-]+)/i,                                     // Windows Media Player
            /(windows-media-player)\/((\d+)[\w\.-]+)/i
            ], [[NAME, /-/g, ' '], VERSION], [

            /windows\/((\d+)[\w\.-]+) upnp\/[\d\.]+ dlnadoc\/[\d\.]+ (home media server)/i
                                                                                // Windows Media Server
            ], [VERSION, [NAME, 'Windows']], [

            /(com\.riseupradioalarm)\/((\d+)[\d\.]*)/i                          // RiseUP Radio Alarm
            ], [NAME, VERSION], [

            /(rad.io)\s((\d+)[\d\.]+)/i,                                        // Rad.io
            /(radio.(?:de|at|fr))\s((\d+)[\d\.]+)/i
            ], [[NAME, 'rad.io'], VERSION]

            //////////////////////
            // Media players END
            ////////////////////*/

        ],

        cpu : [[

            /(?:(amd|x(?:(?:86|64)[_-])?|wow|win)64)[;\)]/i                     // AMD64
            ], [[ARCHITECTURE, 'amd64']], [

            /(ia32(?=;))/i                                                      // IA32 (quicktime)
            ], [[ARCHITECTURE, util.lowerize]], [

            /((?:i[346]|x)86)[;\)]/i                                            // IA32
            ], [[ARCHITECTURE, 'ia32']], [

            // PocketPC mistakenly identified as PowerPC
            /windows\s(ce|mobile);\sppc;/i
            ], [[ARCHITECTURE, 'arm']], [

            /((?:ppc|powerpc)(?:64)?)(?:\smac|;|\))/i                           // PowerPC
            ], [[ARCHITECTURE, /ower/, '', util.lowerize]], [

            /(sun4\w)[;\)]/i                                                    // SPARC
            ], [[ARCHITECTURE, 'sparc']], [

            /((?:avr32|ia64(?=;))|68k(?=\))|arm(?:64|(?=v\d+;))|(?=atmel\s)avr|(?:irix|mips|sparc)(?:64)?(?=;)|pa-risc)/i
                                                                                // IA64, 68K, ARM/64, AVR/32, IRIX/64, MIPS/64, SPARC/64, PA-RISC
            ], [[ARCHITECTURE, util.lowerize]]
        ],

        device : [[

            /\((ipad|playbook);[\w\s\);-]+(rim|apple)/i                         // iPad/PlayBook
            ], [MODEL, VENDOR, [TYPE, TABLET]], [

            /applecoremedia\/[\w\.]+ \((ipad)/                                  // iPad
            ], [MODEL, [VENDOR, 'Apple'], [TYPE, TABLET]], [

            /(apple\s{0,1}tv)/i                                                 // Apple TV
            ], [[MODEL, 'Apple TV'], [VENDOR, 'Apple']], [

            /(archos)\s(gamepad2?)/i,                                           // Archos
            /(hp).+(touchpad)/i,                                                // HP TouchPad
            /(kindle)\/([\w\.]+)/i,                                             // Kindle
            /\s(nook)[\w\s]+build\/(\w+)/i,                                     // Nook
            /(dell)\s(strea[kpr\s\d]*[\dko])/i                                  // Dell Streak
            ], [VENDOR, MODEL, [TYPE, TABLET]], [

            /(kf[A-z]+)\sbuild\/[\w\.]+.*silk\//i                               // Kindle Fire HD
            ], [MODEL, [VENDOR, 'Amazon'], [TYPE, TABLET]], [
            /(sd|kf)[0349hijorstuw]+\sbuild\/[\w\.]+.*silk\//i                  // Fire Phone
            ], [[MODEL, mapper.str, maps.device.amazon.model], [VENDOR, 'Amazon'], [TYPE, MOBILE]], [

            /\((ip[honed|\s\w*]+);.+(apple)/i                                   // iPod/iPhone
            ], [MODEL, VENDOR, [TYPE, MOBILE]], [
            /\((ip[honed|\s\w*]+);/i                                            // iPod/iPhone
            ], [MODEL, [VENDOR, 'Apple'], [TYPE, MOBILE]], [

            /(blackberry)[\s-]?(\w+)/i,                                         // BlackBerry
            /(blackberry|benq|palm(?=\-)|sonyericsson|acer|asus|dell|huawei|meizu|motorola|polytron)[\s_-]?([\w-]+)*/i,
                                                                                // BenQ/Palm/Sony-Ericsson/Acer/Asus/Dell/Huawei/Meizu/Motorola/Polytron
            /(hp)\s([\w\s]+\w)/i,                                               // HP iPAQ
            /(asus)-?(\w+)/i                                                    // Asus
            ], [VENDOR, MODEL, [TYPE, MOBILE]], [
            /\(bb10;\s(\w+)/i                                                   // BlackBerry 10
            ], [MODEL, [VENDOR, 'BlackBerry'], [TYPE, MOBILE]], [
                                                                                // Asus Tablets
            /android.+(transfo[prime\s]{4,10}\s\w+|eeepc|slider\s\w+|nexus 7)/i
            ], [MODEL, [VENDOR, 'Asus'], [TYPE, TABLET]], [

            /(sony)\s(tablet\s[ps])\sbuild\//i,                                  // Sony
            /(sony)?(?:sgp.+)\sbuild\//i
            ], [[VENDOR, 'Sony'], [MODEL, 'Xperia Tablet'], [TYPE, TABLET]], [
            /(?:sony)?(?:(?:(?:c|d)\d{4})|(?:so[-l].+))\sbuild\//i
            ], [[VENDOR, 'Sony'], [MODEL, 'Xperia Phone'], [TYPE, MOBILE]], [

            /\s(ouya)\s/i,                                                      // Ouya
            /(nintendo)\s([wids3u]+)/i                                          // Nintendo
            ], [VENDOR, MODEL, [TYPE, CONSOLE]], [

            /android.+;\s(shield)\sbuild/i                                      // Nvidia
            ], [MODEL, [VENDOR, 'Nvidia'], [TYPE, CONSOLE]], [

            /(playstation\s[34portablevi]+)/i                                   // Playstation
            ], [MODEL, [VENDOR, 'Sony'], [TYPE, CONSOLE]], [

            /(sprint\s(\w+))/i                                                  // Sprint Phones
            ], [[VENDOR, mapper.str, maps.device.sprint.vendor], [MODEL, mapper.str, maps.device.sprint.model], [TYPE, MOBILE]], [

            /(lenovo)\s?(S(?:5000|6000)+(?:[-][\w+]))/i                         // Lenovo tablets
            ], [VENDOR, MODEL, [TYPE, TABLET]], [

            /(htc)[;_\s-]+([\w\s]+(?=\))|\w+)*/i,                               // HTC
            /(zte)-(\w+)*/i,                                                    // ZTE
            /(alcatel|geeksphone|huawei|lenovo|nexian|panasonic|(?=;\s)sony)[_\s-]?([\w-]+)*/i
                                                                                // Alcatel/GeeksPhone/Huawei/Lenovo/Nexian/Panasonic/Sony
            ], [VENDOR, [MODEL, /_/g, ' '], [TYPE, MOBILE]], [

            /(nexus\s9)/i                                                       // HTC Nexus 9
            ], [MODEL, [VENDOR, 'HTC'], [TYPE, TABLET]], [

            /[\s\(;](xbox(?:\sone)?)[\s\);]/i                                   // Microsoft Xbox
            ], [MODEL, [VENDOR, 'Microsoft'], [TYPE, CONSOLE]], [
            /(kin\.[onetw]{3})/i                                                // Microsoft Kin
            ], [[MODEL, /\./g, ' '], [VENDOR, 'Microsoft'], [TYPE, MOBILE]], [

                                                                                // Motorola
            /\s(milestone|droid(?:[2-4x]|\s(?:bionic|x2|pro|razr))?(:?\s4g)?)[\w\s]+build\//i,
            /mot[\s-]?(\w+)*/i,
            /(XT\d{3,4}) build\//i,
            /(nexus\s[6])/i
            ], [MODEL, [VENDOR, 'Motorola'], [TYPE, MOBILE]], [
            /android.+\s(mz60\d|xoom[\s2]{0,2})\sbuild\//i
            ], [MODEL, [VENDOR, 'Motorola'], [TYPE, TABLET]], [

            /android.+((sch-i[89]0\d|shw-m380s|gt-p\d{4}|gt-n8000|sgh-t8[56]9|nexus 10))/i,
            /((SM-T\w+))/i
            ], [[VENDOR, 'Samsung'], MODEL, [TYPE, TABLET]], [                  // Samsung
            /((s[cgp]h-\w+|gt-\w+|galaxy\snexus|sm-n900))/i,
            /(sam[sung]*)[\s-]*(\w+-?[\w-]*)*/i,
            /sec-((sgh\w+))/i
            ], [[VENDOR, 'Samsung'], MODEL, [TYPE, MOBILE]], [
            /(samsung);smarttv/i
            ], [VENDOR, MODEL, [TYPE, SMARTTV]], [

            /\(dtv[\);].+(aquos)/i                                              // Sharp
            ], [MODEL, [VENDOR, 'Sharp'], [TYPE, SMARTTV]], [
            /sie-(\w+)*/i                                                       // Siemens
            ], [MODEL, [VENDOR, 'Siemens'], [TYPE, MOBILE]], [

            /(maemo|nokia).*(n900|lumia\s\d+)/i,                                // Nokia
            /(nokia)[\s_-]?([\w-]+)*/i
            ], [[VENDOR, 'Nokia'], MODEL, [TYPE, MOBILE]], [

            /android\s3\.[\s\w;-]{10}(a\d{3})/i                                 // Acer
            ], [MODEL, [VENDOR, 'Acer'], [TYPE, TABLET]], [

            /android\s3\.[\s\w;-]{10}(lg?)-([06cv9]{3,4})/i                     // LG Tablet
            ], [[VENDOR, 'LG'], MODEL, [TYPE, TABLET]], [
            /(lg) netcast\.tv/i                                                 // LG SmartTV
            ], [VENDOR, MODEL, [TYPE, SMARTTV]], [
            /(nexus\s[45])/i,                                                   // LG
            /lg[e;\s\/-]+(\w+)*/i
            ], [MODEL, [VENDOR, 'LG'], [TYPE, MOBILE]], [

            /android.+(ideatab[a-z0-9\-\s]+)/i                                  // Lenovo
            ], [MODEL, [VENDOR, 'Lenovo'], [TYPE, TABLET]], [

            /linux;.+((jolla));/i                                               // Jolla
            ], [VENDOR, MODEL, [TYPE, MOBILE]], [

            /((pebble))app\/[\d\.]+\s/i                                         // Pebble
            ], [VENDOR, MODEL, [TYPE, WEARABLE]], [

            /android.+;\s(glass)\s\d/i                                          // Google Glass
            ], [MODEL, [VENDOR, 'Google'], [TYPE, WEARABLE]], [

            /android.+(\w+)\s+build\/hm\1/i,                                        // Xiaomi Hongmi 'numeric' models
            /android.+(hm[\s\-_]*note?[\s_]*(?:\d\w)?)\s+build/i,                   // Xiaomi Hongmi
            /android.+(mi[\s\-_]*(?:one|one[\s_]plus)?[\s_]*(?:\d\w)?)\s+build/i    // Xiaomi Mi
            ], [[MODEL, /_/g, ' '], [VENDOR, 'Xiaomi'], [TYPE, MOBILE]], [

            /\s(tablet)[;\/\s]/i,                                               // Unidentifiable Tablet
            /\s(mobile)[;\/\s]/i                                                // Unidentifiable Mobile
            ], [[TYPE, util.lowerize], VENDOR, MODEL]

            /*//////////////////////////
            // TODO: move to string map
            ////////////////////////////

            /(C6603)/i                                                          // Sony Xperia Z C6603
            ], [[MODEL, 'Xperia Z C6603'], [VENDOR, 'Sony'], [TYPE, MOBILE]], [
            /(C6903)/i                                                          // Sony Xperia Z 1
            ], [[MODEL, 'Xperia Z 1'], [VENDOR, 'Sony'], [TYPE, MOBILE]], [

            /(SM-G900[F|H])/i                                                   // Samsung Galaxy S5
            ], [[MODEL, 'Galaxy S5'], [VENDOR, 'Samsung'], [TYPE, MOBILE]], [
            /(SM-G7102)/i                                                       // Samsung Galaxy Grand 2
            ], [[MODEL, 'Galaxy Grand 2'], [VENDOR, 'Samsung'], [TYPE, MOBILE]], [
            /(SM-G530H)/i                                                       // Samsung Galaxy Grand Prime
            ], [[MODEL, 'Galaxy Grand Prime'], [VENDOR, 'Samsung'], [TYPE, MOBILE]], [
            /(SM-G313HZ)/i                                                      // Samsung Galaxy V
            ], [[MODEL, 'Galaxy V'], [VENDOR, 'Samsung'], [TYPE, MOBILE]], [
            /(SM-T805)/i                                                        // Samsung Galaxy Tab S 10.5
            ], [[MODEL, 'Galaxy Tab S 10.5'], [VENDOR, 'Samsung'], [TYPE, TABLET]], [
            /(SM-G800F)/i                                                       // Samsung Galaxy S5 Mini
            ], [[MODEL, 'Galaxy S5 Mini'], [VENDOR, 'Samsung'], [TYPE, MOBILE]], [
            /(SM-T311)/i                                                        // Samsung Galaxy Tab 3 8.0
            ], [[MODEL, 'Galaxy Tab 3 8.0'], [VENDOR, 'Samsung'], [TYPE, TABLET]], [

            /(R1001)/i                                                          // Oppo R1001
            ], [MODEL, [VENDOR, 'OPPO'], [TYPE, MOBILE]], [
            /(X9006)/i                                                          // Oppo Find 7a
            ], [[MODEL, 'Find 7a'], [VENDOR, 'Oppo'], [TYPE, MOBILE]], [
            /(R2001)/i                                                          // Oppo YOYO R2001
            ], [[MODEL, 'Yoyo R2001'], [VENDOR, 'Oppo'], [TYPE, MOBILE]], [
            /(R815)/i                                                           // Oppo Clover R815
            ], [[MODEL, 'Clover R815'], [VENDOR, 'Oppo'], [TYPE, MOBILE]], [
             /(U707)/i                                                          // Oppo Find Way S
            ], [[MODEL, 'Find Way S'], [VENDOR, 'Oppo'], [TYPE, MOBILE]], [

            /(T3C)/i                                                            // Advan Vandroid T3C
            ], [MODEL, [VENDOR, 'Advan'], [TYPE, TABLET]], [
            /(ADVAN T1J\+)/i                                                    // Advan Vandroid T1J+
            ], [[MODEL, 'Vandroid T1J+'], [VENDOR, 'Advan'], [TYPE, TABLET]], [
            /(ADVAN S4A)/i                                                      // Advan Vandroid S4A
            ], [[MODEL, 'Vandroid S4A'], [VENDOR, 'Advan'], [TYPE, MOBILE]], [

            /(V972M)/i                                                          // ZTE V972M
            ], [MODEL, [VENDOR, 'ZTE'], [TYPE, MOBILE]], [

            /(i-mobile)\s(IQ\s[\d\.]+)/i                                        // i-mobile IQ
            ], [VENDOR, MODEL, [TYPE, MOBILE]], [
            /(IQ6.3)/i                                                          // i-mobile IQ IQ 6.3
            ], [[MODEL, 'IQ 6.3'], [VENDOR, 'i-mobile'], [TYPE, MOBILE]], [
            /(i-mobile)\s(i-style\s[\d\.]+)/i                                   // i-mobile i-STYLE
            ], [VENDOR, MODEL, [TYPE, MOBILE]], [
            /(i-STYLE2.1)/i                                                     // i-mobile i-STYLE 2.1
            ], [[MODEL, 'i-STYLE 2.1'], [VENDOR, 'i-mobile'], [TYPE, MOBILE]], [

            /(mobiistar touch LAI 512)/i                                        // mobiistar touch LAI 512
            ], [[MODEL, 'Touch LAI 512'], [VENDOR, 'mobiistar'], [TYPE, MOBILE]], [

            /////////////
            // END TODO
            ///////////*/

        ],

        engine : [[

            /windows.+\sedge\/([\w\.]+)/i                                       // EdgeHTML
            ], [VERSION, [NAME, 'EdgeHTML']], [

            /(presto)\/([\w\.]+)/i,                                             // Presto
            /(webkit|trident|netfront|netsurf|amaya|lynx|w3m)\/([\w\.]+)/i,     // WebKit/Trident/NetFront/NetSurf/Amaya/Lynx/w3m
            /(khtml|tasman|links)[\/\s]\(?([\w\.]+)/i,                          // KHTML/Tasman/Links
            /(icab)[\/\s]([23]\.[\d\.]+)/i                                      // iCab
            ], [NAME, VERSION], [

            /rv\:([\w\.]+).*(gecko)/i                                           // Gecko
            ], [VERSION, NAME]
        ],

        os : [[

            // Windows based
            /microsoft\s(windows)\s(vista|xp)/i                                 // Windows (iTunes)
            ], [NAME, VERSION], [
            /(windows)\snt\s6\.2;\s(arm)/i,                                     // Windows RT
            /(windows\sphone(?:\sos)*|windows\smobile|windows)[\s\/]?([ntce\d\.\s]+\w)/i
            ], [[NAME, mapper.str, maps.os.windows.name], [VERSION, mapper.str, maps.os.windows.version]], [
            /(win(?=3|9|n)|win\s9x\s)([nt\d\.]+)/i
            ], [[NAME, 'Windows'], [VERSION, mapper.str, maps.os.windows.version]], [

            // Mobile/Embedded OS
            /\((bb)(10);/i                                                      // BlackBerry 10
            ], [[NAME, 'BlackBerry'], VERSION], [
            /(blackberry)\w*\/?([\w\.]+)*/i,                                    // Blackberry
            /(tizen)[\/\s]([\w\.]+)/i,                                          // Tizen
            /(android|webos|palm\sos|qnx|bada|rim\stablet\sos|meego|contiki)[\/\s-]?([\w\.]+)*/i,
                                                                                // Android/WebOS/Palm/QNX/Bada/RIM/MeeGo/Contiki
            /linux;.+(sailfish);/i                                              // Sailfish OS
            ], [NAME, VERSION], [
            /(symbian\s?o?s?|symbos|s60(?=;))[\/\s-]?([\w\.]+)*/i               // Symbian
            ], [[NAME, 'Symbian'], VERSION], [
            /\((series40);/i                                                    // Series 40
            ], [NAME], [
            /mozilla.+\(mobile;.+gecko.+firefox/i                               // Firefox OS
            ], [[NAME, 'Firefox OS'], VERSION], [

            // Console
            /(nintendo|playstation)\s([wids34portablevu]+)/i,                   // Nintendo/Playstation

            // GNU/Linux based
            /(mint)[\/\s\(]?(\w+)*/i,                                           // Mint
            /(mageia|vectorlinux)[;\s]/i,                                       // Mageia/VectorLinux
            /(joli|[kxln]?ubuntu|debian|[open]*suse|gentoo|(?=\s)arch|slackware|fedora|mandriva|centos|pclinuxos|redhat|zenwalk|linpus)[\/\s-]?([\w\.-]+)*/i,
                                                                                // Joli/Ubuntu/Debian/SUSE/Gentoo/Arch/Slackware
                                                                                // Fedora/Mandriva/CentOS/PCLinuxOS/RedHat/Zenwalk/Linpus
            /(hurd|linux)\s?([\w\.]+)*/i,                                       // Hurd/Linux
            /(gnu)\s?([\w\.]+)*/i                                               // GNU
            ], [[NAME, 'Linux'], VERSION], [

            /(cros)\s[\w]+\s([\w\.]+\w)/i                                       // Chromium OS
            ], [[NAME, 'Chromium OS'], VERSION],[

            // Solaris
            /(sunos)\s?([\w\.]+\d)*/i                                           // Solaris
            ], [[NAME, 'Solaris'], VERSION], [

            // BSD based
            /\s([frentopc-]{0,4}bsd|dragonfly)\s?([\w\.]+)*/i                   // FreeBSD/NetBSD/OpenBSD/PC-BSD/DragonFly
            ], [[NAME, 'Linux'], VERSION],[

            /(iphone)(?:.*os\s*([\w]+)*\slike\smac|;\sopera)/i                  // iOS
            ], [[NAME, 'iPhone'], [VERSION, /_/g, '.']], [

            /(ipad)(?:.*os\s*([\w]+)*\slike\smac|;\sopera)/i                    // iOS
            ], [[NAME, 'iPad'], [VERSION, /_/g, '.']], [

            /(ip[honead]+)(?:.*os\s([\w]+)*\slike\smac|;\sopera)/i              // iOS
            ], [[NAME, 'iOS'], [VERSION, /_/g, '.']], [

            /(mac\sos\sx)\s?([\w\s\.]+\w)*/i,
            /(macintosh|mac(?=_powerpc)\s)/i                                    // Mac OS
            ], [[NAME, 'Mac'], [VERSION, /_/g, '.']], [

            // Other
            /((?:open)?solaris)[\/\s-]?([\w\.]+)*/i,                            // Solaris
            /(haiku)\s(\w+)/i,                                                  // Haiku
            /(aix)\s((\d)(?=\.|\)|\s)[\w\.]*)*/i,                               // AIX
            /(plan\s9|minix|beos|os\/2|amigaos|morphos|risc\sos|openvms)/i,
                                                                                // Plan9/Minix/BeOS/OS2/AmigaOS/MorphOS/RISCOS/OpenVMS
            /(unix)\s?([\w\.]+)*/i                                              // UNIX
            ], [NAME, VERSION]
        ]
    };


    /////////////////
    // Constructor
    ////////////////


    var UAParser = function (uastring, extensions) {

        if (!(this instanceof UAParser)) {
            return new UAParser(uastring, extensions).getResult();
        }

        var ua = uastring || ((window && window.navigator && window.navigator.userAgent) ? window.navigator.userAgent : EMPTY);
        var rgxmap = extensions ? util.extend(regexes, extensions) : regexes;

        this.getBrowser = function () {
            var browser = mapper.rgx.apply(this, rgxmap.browser);
            browser.major = util.major(browser.version);
            return browser;
        };
        this.getCPU = function () {
            return mapper.rgx.apply(this, rgxmap.cpu);
        };
        this.getDevice = function () {
            return mapper.rgx.apply(this, rgxmap.device);
        };
        this.getEngine = function () {
            return mapper.rgx.apply(this, rgxmap.engine);
        };
        this.getOS = function () {
            return mapper.rgx.apply(this, rgxmap.os);
        };
        this.getResult = function() {
            return {
                ua      : this.getUA(),
                browser : this.getBrowser(),
                engine  : this.getEngine(),
                os      : this.getOS(),
                device  : this.getDevice(),
                cpu     : this.getCPU()
            };
        };
        this.getUA = function () {
            return ua;
        };
        this.setUA = function (uastring) {
            ua = uastring;
            return this;
        };
        return this;
    };

    UAParser.VERSION = LIBVERSION;
    UAParser.BROWSER = {
        NAME    : NAME,
        MAJOR   : MAJOR, // deprecated
        VERSION : VERSION
    };
    UAParser.CPU = {
        ARCHITECTURE : ARCHITECTURE
    };
    UAParser.DEVICE = {
        MODEL   : MODEL,
        VENDOR  : VENDOR,
        TYPE    : TYPE,
        CONSOLE : CONSOLE,
        MOBILE  : MOBILE,
        SMARTTV : SMARTTV,
        TABLET  : TABLET,
        WEARABLE: WEARABLE,
        EMBEDDED: EMBEDDED
    };
    UAParser.ENGINE = {
        NAME    : NAME,
        VERSION : VERSION
    };
    UAParser.OS = {
        NAME    : NAME,
        VERSION : VERSION
    };


    ///////////
    // Export
    //////////


    // check js environment
    if ('object' !== UNDEF_TYPE) {
        // nodejs env
        if ('object' !== UNDEF_TYPE && module.exports) {
            exports = module.exports = UAParser;
        }
        exports.UAParser = UAParser;
    } else {
        // requirejs env (optional)
        if (typeof(undefined) === FUNC_TYPE && undefined.amd) {
            undefined("ua-parser-js", [], function () {
                return UAParser;
            });
        } else {
            // browser env
            window.UAParser = UAParser;
        }
    }

    // jQuery/Zepto specific (optional)
    // Note:
    //   In AMD env the global scope should be kept clean, but jQuery is an exception.
    //   jQuery always exports to global scope, unless jQuery.noConflict(true) is used,
    //   and we should catch that.
    var $ = window.jQuery || window.Zepto;
    if (typeof $ !== UNDEF_TYPE) {
        var parser = new UAParser();
        $.ua = parser.getResult();
        $.ua.get = function() {
            return parser.getUA();
        };
        $.ua.set = function (uastring) {
            parser.setUA(uastring);
            var result = parser.getResult();
            for (var prop in result) {
                $.ua[prop] = result[prop];
            }
        };
    }

})(typeof window === 'object' ? window : commonjsGlobal);
});

/* jshint bitwise: false, laxbreak: true */

/**
 * Source: [jed's gist]{@link https://gist.github.com/982883}.
 * Returns a random v4 UUID of the form xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx,
 * where each x is replaced with a random hexadecimal digit from 0 to f, and
 * y is replaced with a random hexadecimal digit from 8 to b.
 * Used to generate UUIDs for deviceIds.
 * @private
 */
var uuid$1 = function uuid(a) {
    return a // if the placeholder was passed, return
    ? ( // a random number from 0 to 15
    a ^ // unless b is 8,
    Math.random() // in which case
    * 16 // a random number from
    >> a / 4 // 8 to 11
    ).toString(16) // in hexadecimal
    : ( // or otherwise a concatenated string:
    [1e7] + // 10000000 +
    -1e3 + // -1000 +
    -4e3 + // -4000 +
    -8e3 + // -80000000 +
    -1e11 // -100000000000,
    ).replace( // replacing
    /[018]/g, // zeroes, ones, and eights with
    uuid // random hex digits
    );
};

var version = '4.5.0';

var getLanguage = function getLanguage() {
    return navigator && (navigator.languages && navigator.languages[0] || navigator.language || navigator.userLanguage) || undefined;
};

var language = {
    language: getLanguage()
};

// default options
var DEFAULT_OPTIONS = {
  apiEndpoint: 'api.amplitude.com',
  batchEvents: false,
  cookieExpiration: 365 * 10,
  cookieName: 'amplitude_id',
  deviceIdFromUrlParam: false,
  domain: '',
  eventUploadPeriodMillis: 30 * 1000, // 30s
  eventUploadThreshold: 30,
  forceHttps: true,
  includeGclid: false,
  includeReferrer: false,
  includeUtm: false,
  language: language.language,
  logLevel: 'WARN',
  optOut: false,
  platform: 'Web',
  savedMaxCount: 1000,
  saveEvents: true,
  saveParamsReferrerOncePerSession: true,
  sessionTimeout: 30 * 60 * 1000,
  trackingOptions: {
    city: true,
    country: true,
    device_model: true,
    dma: true,
    ip_address: true,
    language: true,
    os_name: true,
    os_version: true,
    platform: true,
    region: true,
    version_name: true
  },
  unsentKey: 'amplitude_unsent',
  unsentIdentifyKey: 'amplitude_unsent_identify',
  uploadBatchSize: 100
};

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

/**
 * AmplitudeClient SDK API - instance constructor.
 * The Amplitude class handles creation of client instances, all you need to do is call amplitude.getInstance()
 * @constructor AmplitudeClient
 * @public
 * @example var amplitudeClient = new AmplitudeClient();
 */
var AmplitudeClient = function AmplitudeClient(instanceName) {
  this._instanceName = utils.isEmptyString(instanceName) ? constants.DEFAULT_INSTANCE : instanceName.toLowerCase();
  this._legacyStorageSuffix = this._instanceName === constants.DEFAULT_INSTANCE ? '' : '_' + this._instanceName;
  this._unsentEvents = [];
  this._unsentIdentifys = [];
  this._ua = new uaParser(navigator.userAgent).getResult();
  this.options = merge_1$1({}, DEFAULT_OPTIONS);
  this.cookieStorage = new cookieStorage().getStorage();
  this._q = []; // queue for proxied functions before script load
  this._sending = false;
  this._updateScheduled = false;

  // event meta data
  this._eventId = 0;
  this._identifyId = 0;
  this._lastEventTime = null;
  this._newSession = false;
  this._sequenceNumber = 0;
  this._sessionId = null;

  this._userAgent = navigator && navigator.userAgent || null;
};

AmplitudeClient.prototype.Identify = Identify;
AmplitudeClient.prototype.Revenue = Revenue;

/**
 * Initializes the Amplitude Javascript SDK with your apiKey and any optional configurations.
 * This is required before any other methods can be called.
 * @public
 * @param {string} apiKey - The API key for your app.
 * @param {string} opt_userId - (optional) An identifier for this user.
 * @param {object} opt_config - (optional) Configuration options.
 * See [Readme]{@link https://github.com/amplitude/Amplitude-Javascript#configuration-options} for list of options and default values.
 * @param {function} opt_callback - (optional) Provide a callback function to run after initialization is complete.
 * @example amplitudeClient.init('API_KEY', 'USER_ID', {includeReferrer: true, includeUtm: true}, function() { alert('init complete'); });
 */
AmplitudeClient.prototype.init = function init(apiKey, opt_userId, opt_config, opt_callback) {
  if (type(apiKey) !== 'string' || utils.isEmptyString(apiKey)) {
    utils.log.error('Invalid apiKey. Please re-initialize with a valid apiKey');
    return;
  }

  try {
    this.options.apiKey = apiKey;
    this._storageSuffix = '_' + apiKey + this._legacyStorageSuffix;

    _parseConfig(this.options, opt_config);
    var trackingOptions = _generateApiPropertiesTrackingConfig(this);
    this._apiPropertiesTrackingOptions = Object.keys(trackingOptions).length > 0 ? { tracking_options: trackingOptions } : {};

    this.cookieStorage.options({
      expirationDays: this.options.cookieExpiration,
      domain: this.options.domain
    });
    this.options.domain = this.cookieStorage.options().domain;

    if (this._instanceName === constants.DEFAULT_INSTANCE) {
      _upgradeCookieData(this);
    }
    _loadCookieData(this);

    // load deviceId and userId from input, or try to fetch existing value from cookie
    this.options.deviceId = type(opt_config) === 'object' && type(opt_config.deviceId) === 'string' && !utils.isEmptyString(opt_config.deviceId) && opt_config.deviceId || this.options.deviceIdFromUrlParam && this._getDeviceIdFromUrlParam(this._getUrlParams()) || this.options.deviceId || uuid$1() + 'R';
    this.options.userId = type(opt_userId) === 'string' && !utils.isEmptyString(opt_userId) && opt_userId || type(opt_userId) === 'number' && opt_userId.toString() || this.options.userId || null;

    // load unsent events and identifies before any attempt to log new ones
    if (this.options.saveEvents) {
      this._unsentEvents = this._loadSavedUnsentEvents(this.options.unsentKey);
      this._unsentIdentifys = this._loadSavedUnsentEvents(this.options.unsentIdentifyKey);

      // validate event properties for unsent events
      for (var i = 0; i < this._unsentEvents.length; i++) {
        var eventProperties = this._unsentEvents[i].event_properties;
        var groups = this._unsentEvents[i].groups;
        this._unsentEvents[i].event_properties = utils.validateProperties(eventProperties);
        this._unsentEvents[i].groups = utils.validateGroups(groups);
      }

      // validate user properties for unsent identifys
      for (var j = 0; j < this._unsentIdentifys.length; j++) {
        var userProperties = this._unsentIdentifys[j].user_properties;
        var identifyGroups = this._unsentIdentifys[j].groups;
        this._unsentIdentifys[j].user_properties = utils.validateProperties(userProperties);
        this._unsentIdentifys[j].groups = utils.validateGroups(identifyGroups);
      }
    }

    var now = new Date().getTime();
    if (!this._sessionId || !this._lastEventTime || now - this._lastEventTime > this.options.sessionTimeout) {
      this._newSession = true;
      this._sessionId = now;

      // only capture UTM params and referrer if new session
      if (this.options.saveParamsReferrerOncePerSession) {
        this._trackParamsAndReferrer();
      }
    }

    if (!this.options.saveParamsReferrerOncePerSession) {
      this._trackParamsAndReferrer();
    }

    this._lastEventTime = now;
    _saveCookieData(this);

    this._sendEventsIfReady(); // try sending unsent events
  } catch (e) {
    utils.log.error(e);
  } finally {
    if (type(opt_callback) === 'function') {
      opt_callback(this);
    }
  }
};

/**
 * @private
 */
AmplitudeClient.prototype._trackParamsAndReferrer = function _trackParamsAndReferrer() {
  if (this.options.includeUtm) {
    this._initUtmData();
  }
  if (this.options.includeReferrer) {
    this._saveReferrer(this._getReferrer());
  }
  if (this.options.includeGclid) {
    this._saveGclid(this._getUrlParams());
  }
};

/**
 * Parse and validate user specified config values and overwrite existing option value
 * DEFAULT_OPTIONS provides list of all config keys that are modifiable, as well as expected types for values
 * @private
 */
var _parseConfig = function _parseConfig(options, config) {
  if (type(config) !== 'object') {
    return;
  }

  // validates config value is defined, is the correct type, and some additional value sanity checks
  var parseValidateAndLoad = function parseValidateAndLoad(key) {
    if (!options.hasOwnProperty(key)) {
      return; // skip bogus config values
    }

    var inputValue = config[key];
    var expectedType = type(options[key]);
    if (!utils.validateInput(inputValue, key + ' option', expectedType)) {
      return;
    }
    if (expectedType === 'boolean') {
      options[key] = !!inputValue;
    } else if (expectedType === 'string' && !utils.isEmptyString(inputValue) || expectedType === 'number' && inputValue > 0) {
      options[key] = inputValue;
    } else if (expectedType === 'object') {
      _parseConfig(options[key], inputValue);
    }
  };

  for (var key in config) {
    if (config.hasOwnProperty(key)) {
      parseValidateAndLoad(key);
    }
  }
};

/**
 * Run functions queued up by proxy loading snippet
 * @private
 */
AmplitudeClient.prototype.runQueuedFunctions = function () {
  for (var i = 0; i < this._q.length; i++) {
    var fn = this[this._q[i][0]];
    if (type(fn) === 'function') {
      fn.apply(this, this._q[i].slice(1));
    }
  }
  this._q = []; // clear function queue after running
};

/**
 * Check that the apiKey is set before calling a function. Logs a warning message if not set.
 * @private
 */
AmplitudeClient.prototype._apiKeySet = function _apiKeySet(methodName) {
  if (utils.isEmptyString(this.options.apiKey)) {
    utils.log.error('Invalid apiKey. Please set a valid apiKey with init() before calling ' + methodName);
    return false;
  }
  return true;
};

/**
 * Load saved events from localStorage. JSON deserializes event array. Handles case where string is corrupted.
 * @private
 */
AmplitudeClient.prototype._loadSavedUnsentEvents = function _loadSavedUnsentEvents(unsentKey) {
  var savedUnsentEventsString = this._getFromStorage(localStorage$1, unsentKey);
  var events = this._parseSavedUnsentEventsString(savedUnsentEventsString, unsentKey);

  var savedUnsentEventsStringLegacy = this._getFromStorageLegacy(localStorage$1, unsentKey);
  var legacyEvents = this._parseSavedUnsentEventsString(savedUnsentEventsStringLegacy, unsentKey);

  var unsentEvents = legacyEvents.concat(events);

  // Migrate legacy events out of storage
  this._removeFromLegacyStorage(localStorage$1, unsentKey);
  this._setInStorage(localStorage$1, unsentKey, JSON.stringify(unsentEvents));

  return unsentEvents;
};

AmplitudeClient.prototype._removeFromLegacyStorage = function _removeFromLegacyStorage(storage, key) {
  storage.removeItem(key + this._legacyStorageSuffix);
};

/**
 * Load saved events from localStorage. JSON deserializes event array. Handles case where string is corrupted.
 * @private
 */
AmplitudeClient.prototype._parseSavedUnsentEventsString = function _parseSavedUnsentEventsString(savedUnsentEventsString, unsentKey) {
  if (utils.isEmptyString(savedUnsentEventsString)) {
    return []; // new app, does not have any saved events
  }

  if (type(savedUnsentEventsString) === 'string') {
    try {
      var events = JSON.parse(savedUnsentEventsString);
      if (type(events) === 'array') {
        // handle case where JSON dumping of unsent events is corrupted
        return events;
      }
    } catch (e) {}
  }
  utils.log.error('Unable to load ' + unsentKey + ' events. Restart with a new empty queue.');
  return [];
};

/**
 * Returns true if a new session was created during initialization, otherwise false.
 * @public
 * @return {boolean} Whether a new session was created during initialization.
 */
AmplitudeClient.prototype.isNewSession = function isNewSession() {
  return this._newSession;
};

/**
 * Returns the id of the current session.
 * @public
 * @return {number} Id of the current session.
 */
AmplitudeClient.prototype.getSessionId = function getSessionId() {
  return this._sessionId;
};

/**
 * Increments the eventId and returns it.
 * @private
 */
AmplitudeClient.prototype.nextEventId = function nextEventId() {
  this._eventId++;
  return this._eventId;
};

/**
 * Increments the identifyId and returns it.
 * @private
 */
AmplitudeClient.prototype.nextIdentifyId = function nextIdentifyId() {
  this._identifyId++;
  return this._identifyId;
};

/**
 * Increments the sequenceNumber and returns it.
 * @private
 */
AmplitudeClient.prototype.nextSequenceNumber = function nextSequenceNumber() {
  this._sequenceNumber++;
  return this._sequenceNumber;
};

/**
 * Returns the total count of unsent events and identifys
 * @private
 */
AmplitudeClient.prototype._unsentCount = function _unsentCount() {
  return this._unsentEvents.length + this._unsentIdentifys.length;
};

/**
 * Send events if ready. Returns true if events are sent.
 * @private
 */
AmplitudeClient.prototype._sendEventsIfReady = function _sendEventsIfReady(callback) {
  if (this._unsentCount() === 0) {
    return false;
  }

  // if batching disabled, send any unsent events immediately
  if (!this.options.batchEvents) {
    this.sendEvents(callback);
    return true;
  }

  // if batching enabled, check if min threshold met for batch size
  if (this._unsentCount() >= this.options.eventUploadThreshold) {
    this.sendEvents(callback);
    return true;
  }

  // otherwise schedule an upload after 30s
  if (!this._updateScheduled) {
    // make sure we only schedule 1 upload
    this._updateScheduled = true;
    setTimeout(function () {
      this._updateScheduled = false;
      this.sendEvents();
    }.bind(this), this.options.eventUploadPeriodMillis);
  }

  return false; // an upload was scheduled, no events were uploaded
};

/**
 * Helper function to fetch values from storage
 * Storage argument allows for localStoraoge and sessionStoraoge
 * @private
 */
AmplitudeClient.prototype._getFromStorage = function _getFromStorage(storage, key) {
  return storage.getItem(key + this._storageSuffix);
};

/**
 * Helper function to fetch values from storage
 * Storage argument allows for localStoraoge and sessionStoraoge
 * @private
 */
AmplitudeClient.prototype._getFromStorageLegacy = function _getFromStorageLegacy(storage, key) {
  return storage.getItem(key + this._legacyStorageSuffix);
};

/**
 * Helper function to set values in storage
 * Storage argument allows for localStoraoge and sessionStoraoge
 * @private
 */
AmplitudeClient.prototype._setInStorage = function _setInStorage(storage, key, value) {
  storage.setItem(key + this._storageSuffix, value);
};

/**
 * cookieData (deviceId, userId, optOut, sessionId, lastEventTime, eventId, identifyId, sequenceNumber)
 * can be stored in many different places (localStorage, cookie, etc).
 * Need to unify all sources into one place with a one-time upgrade/migration.
 * @private
 */
var _upgradeCookieData = function _upgradeCookieData(scope) {
  // skip if already migrated to 4.10+
  var cookieData = scope.cookieStorage.get(scope.options.cookieName + scope._storageSuffix);
  if (type(cookieData) === 'object') {
    return;
  }
  // skip if already migrated to 2.70+
  cookieData = scope.cookieStorage.get(scope.options.cookieName + scope._legacyStorageSuffix);
  if (type(cookieData) === 'object' && cookieData.deviceId && cookieData.sessionId && cookieData.lastEventTime) {
    return;
  }

  var _getAndRemoveFromLocalStorage = function _getAndRemoveFromLocalStorage(key) {
    var value = localStorage$1.getItem(key);
    localStorage$1.removeItem(key);
    return value;
  };

  // in v2.6.0, deviceId, userId, optOut was migrated to localStorage with keys + first 6 char of apiKey
  var apiKeySuffix = type(scope.options.apiKey) === 'string' && '_' + scope.options.apiKey.slice(0, 6) || '';
  var localStorageDeviceId = _getAndRemoveFromLocalStorage(constants.DEVICE_ID + apiKeySuffix);
  var localStorageUserId = _getAndRemoveFromLocalStorage(constants.USER_ID + apiKeySuffix);
  var localStorageOptOut = _getAndRemoveFromLocalStorage(constants.OPT_OUT + apiKeySuffix);
  if (localStorageOptOut !== null && localStorageOptOut !== undefined) {
    localStorageOptOut = String(localStorageOptOut) === 'true'; // convert to boolean
  }

  // pre-v2.7.0 event and session meta-data was stored in localStorage. move to cookie for sub-domain support
  var localStorageSessionId = parseInt(_getAndRemoveFromLocalStorage(constants.SESSION_ID));
  var localStorageLastEventTime = parseInt(_getAndRemoveFromLocalStorage(constants.LAST_EVENT_TIME));
  var localStorageEventId = parseInt(_getAndRemoveFromLocalStorage(constants.LAST_EVENT_ID));
  var localStorageIdentifyId = parseInt(_getAndRemoveFromLocalStorage(constants.LAST_IDENTIFY_ID));
  var localStorageSequenceNumber = parseInt(_getAndRemoveFromLocalStorage(constants.LAST_SEQUENCE_NUMBER));

  var _getFromCookie = function _getFromCookie(key) {
    return type(cookieData) === 'object' && cookieData[key];
  };
  scope.options.deviceId = _getFromCookie('deviceId') || localStorageDeviceId;
  scope.options.userId = _getFromCookie('userId') || localStorageUserId;
  scope._sessionId = _getFromCookie('sessionId') || localStorageSessionId || scope._sessionId;
  scope._lastEventTime = _getFromCookie('lastEventTime') || localStorageLastEventTime || scope._lastEventTime;
  scope._eventId = _getFromCookie('eventId') || localStorageEventId || scope._eventId;
  scope._identifyId = _getFromCookie('identifyId') || localStorageIdentifyId || scope._identifyId;
  scope._sequenceNumber = _getFromCookie('sequenceNumber') || localStorageSequenceNumber || scope._sequenceNumber;

  // optOut is a little trickier since it is a boolean
  scope.options.optOut = localStorageOptOut || false;
  if (cookieData && cookieData.optOut !== undefined && cookieData.optOut !== null) {
    scope.options.optOut = String(cookieData.optOut) === 'true';
  }

  _saveCookieData(scope);
};

/**
 * Fetches deviceId, userId, event meta data from amplitude cookie
 * @private
 */
var _loadCookieData = function _loadCookieData(scope) {
  var cookieData = scope.cookieStorage.get(scope.options.cookieName + scope._storageSuffix);

  if (type(cookieData) === 'object') {
    _loadCookieDataProps(scope, cookieData);
  } else {
    var legacyCookieData = scope.cookieStorage.get(scope.options.cookieName + scope._legacyStorageSuffix);
    if (type(legacyCookieData) === 'object') {
      scope.cookieStorage.remove(scope.options.cookieName + scope._legacyStorageSuffix);
      _loadCookieDataProps(scope, legacyCookieData);
    }
  }
};

var _loadCookieDataProps = function _loadCookieDataProps(scope, cookieData) {
  if (cookieData.deviceId) {
    scope.options.deviceId = cookieData.deviceId;
  }
  if (cookieData.userId) {
    scope.options.userId = cookieData.userId;
  }
  if (cookieData.optOut !== null && cookieData.optOut !== undefined) {
    scope.options.optOut = cookieData.optOut;
  }
  if (cookieData.sessionId) {
    scope._sessionId = parseInt(cookieData.sessionId);
  }
  if (cookieData.lastEventTime) {
    scope._lastEventTime = parseInt(cookieData.lastEventTime);
  }
  if (cookieData.eventId) {
    scope._eventId = parseInt(cookieData.eventId);
  }
  if (cookieData.identifyId) {
    scope._identifyId = parseInt(cookieData.identifyId);
  }
  if (cookieData.sequenceNumber) {
    scope._sequenceNumber = parseInt(cookieData.sequenceNumber);
  }
};

/**
 * Saves deviceId, userId, event meta data to amplitude cookie
 * @private
 */
var _saveCookieData = function _saveCookieData(scope) {
  scope.cookieStorage.set(scope.options.cookieName + scope._storageSuffix, {
    deviceId: scope.options.deviceId,
    userId: scope.options.userId,
    optOut: scope.options.optOut,
    sessionId: scope._sessionId,
    lastEventTime: scope._lastEventTime,
    eventId: scope._eventId,
    identifyId: scope._identifyId,
    sequenceNumber: scope._sequenceNumber
  });
};

/**
 * Parse the utm properties out of cookies and query for adding to user properties.
 * @private
 */
AmplitudeClient.prototype._initUtmData = function _initUtmData(queryParams, cookieParams) {
  queryParams = queryParams || this._getUrlParams();
  cookieParams = cookieParams || this.cookieStorage.get('__utmz');
  var utmProperties = getUtmData(cookieParams, queryParams);
  _sendParamsReferrerUserProperties(this, utmProperties);
};

/**
 * The calling function should determine when it is appropriate to send these user properties. This function
 * will no longer contain any session storage checking logic.
 * @private
 */
var _sendParamsReferrerUserProperties = function _sendParamsReferrerUserProperties(scope, userProperties) {
  if (type(userProperties) !== 'object' || Object.keys(userProperties).length === 0) {
    return;
  }

  // setOnce the initial user properties
  var identify = new Identify();
  for (var key in userProperties) {
    if (userProperties.hasOwnProperty(key)) {
      identify.setOnce('initial_' + key, userProperties[key]);
      identify.set(key, userProperties[key]);
    }
  }

  scope.identify(identify);
};

/**
 * @private
 */
AmplitudeClient.prototype._getReferrer = function _getReferrer() {
  return document.referrer;
};

/**
 * @private
 */
AmplitudeClient.prototype._getUrlParams = function _getUrlParams() {
  return location.search;
};

/**
 * Try to fetch Google Gclid from url params.
 * @private
 */
AmplitudeClient.prototype._saveGclid = function _saveGclid(urlParams) {
  var gclid = utils.getQueryParam('gclid', urlParams);
  if (utils.isEmptyString(gclid)) {
    return;
  }
  var gclidProperties = { 'gclid': gclid };
  _sendParamsReferrerUserProperties(this, gclidProperties);
};

/**
 * Try to fetch Amplitude device id from url params.
 * @private
 */
AmplitudeClient.prototype._getDeviceIdFromUrlParam = function _getDeviceIdFromUrlParam(urlParams) {
  return utils.getQueryParam(constants.AMP_DEVICE_ID_PARAM, urlParams);
};

/**
 * Parse the domain from referrer info
 * @private
 */
AmplitudeClient.prototype._getReferringDomain = function _getReferringDomain(referrer) {
  if (utils.isEmptyString(referrer)) {
    return null;
  }
  var parts = referrer.split('/');
  if (parts.length >= 3) {
    return parts[2];
  }
  return null;
};

/**
 * Fetch the referrer information, parse the domain and send.
 * Since user properties are propagated on the server, only send once per session, don't need to send with every event
 * @private
 */
AmplitudeClient.prototype._saveReferrer = function _saveReferrer(referrer) {
  if (utils.isEmptyString(referrer)) {
    return;
  }
  var referrerInfo = {
    'referrer': referrer,
    'referring_domain': this._getReferringDomain(referrer)
  };
  _sendParamsReferrerUserProperties(this, referrerInfo);
};

/**
 * Saves unsent events and identifies to localStorage. JSON stringifies event queues before saving.
 * Note: this is called automatically every time events are logged, unless you explicitly set option saveEvents to false.
 * @private
 */
AmplitudeClient.prototype.saveEvents = function saveEvents() {
  try {
    this._setInStorage(localStorage$1, this.options.unsentKey, JSON.stringify(this._unsentEvents));
  } catch (e) {}

  try {
    this._setInStorage(localStorage$1, this.options.unsentIdentifyKey, JSON.stringify(this._unsentIdentifys));
  } catch (e) {}
};

/**
 * Sets a customer domain for the amplitude cookie. Useful if you want to support cross-subdomain tracking.
 * @public
 * @param {string} domain to set.
 * @example amplitudeClient.setDomain('.amplitude.com');
 */
AmplitudeClient.prototype.setDomain = function setDomain(domain) {
  if (!utils.validateInput(domain, 'domain', 'string')) {
    return;
  }

  try {
    this.cookieStorage.options({
      domain: domain
    });
    this.options.domain = this.cookieStorage.options().domain;
    _loadCookieData(this);
    _saveCookieData(this);
  } catch (e) {
    utils.log.error(e);
  }
};

/**
 * Sets an identifier for the current user.
 * @public
 * @param {string} userId - identifier to set. Can be null.
 * @example amplitudeClient.setUserId('joe@gmail.com');
 */
AmplitudeClient.prototype.setUserId = function setUserId(userId) {
  try {
    this.options.userId = userId !== undefined && userId !== null && '' + userId || null;
    _saveCookieData(this);
  } catch (e) {
    utils.log.error(e);
  }
};

/**
 * Add user to a group or groups. You need to specify a groupType and groupName(s).
 * For example you can group people by their organization.
 * In that case groupType is "orgId" and groupName would be the actual ID(s).
 * groupName can be a string or an array of strings to indicate a user in multiple gruups.
 * You can also call setGroup multiple times with different groupTypes to track multiple types of groups (up to 5 per app).
 * Note: this will also set groupType: groupName as a user property.
 * See the [SDK Readme]{@link https://github.com/amplitude/Amplitude-Javascript#setting-groups} for more information.
 * @public
 * @param {string} groupType - the group type (ex: orgId)
 * @param {string|list} groupName - the name of the group (ex: 15), or a list of names of the groups
 * @example amplitudeClient.setGroup('orgId', 15); // this adds the current user to orgId 15.
 */
AmplitudeClient.prototype.setGroup = function (groupType, groupName) {
  if (!this._apiKeySet('setGroup()') || !utils.validateInput(groupType, 'groupType', 'string') || utils.isEmptyString(groupType)) {
    return;
  }

  var groups = {};
  groups[groupType] = groupName;
  var identify = new Identify().set(groupType, groupName);
  this._logEvent(constants.IDENTIFY_EVENT, null, null, identify.userPropertiesOperations, groups, null, null, null);
};

/**
 * Sets whether to opt current user out of tracking.
 * @public
 * @param {boolean} enable - if true then no events will be logged or sent.
 * @example: amplitude.setOptOut(true);
 */
AmplitudeClient.prototype.setOptOut = function setOptOut(enable) {
  if (!utils.validateInput(enable, 'enable', 'boolean')) {
    return;
  }

  try {
    this.options.optOut = enable;
    _saveCookieData(this);
  } catch (e) {
    utils.log.error(e);
  }
};

AmplitudeClient.prototype.setSessionId = function setSessionId(sessionId) {
  if (!utils.validateInput(sessionId, 'sessionId', 'number')) {
    return;
  }

  try {
    this._sessionId = sessionId;
    _saveCookieData(this);
  } catch (e) {
    utils.log.error(e);
  }
};

AmplitudeClient.prototype.resetSessionId = function resetSessionId() {
  this.setSessionId(new Date().getTime());
};

/**
  * Regenerates a new random deviceId for current user. Note: this is not recommended unless you know what you
  * are doing. This can be used in conjunction with `setUserId(null)` to anonymize users after they log out.
  * With a null userId and a completely new deviceId, the current user would appear as a brand new user in dashboard.
  * This uses src/uuid.js to regenerate the deviceId.
  * @public
  */
AmplitudeClient.prototype.regenerateDeviceId = function regenerateDeviceId() {
  this.setDeviceId(uuid$1() + 'R');
};

/**
  * Sets a custom deviceId for current user. Note: this is not recommended unless you know what you are doing
  * (like if you have your own system for managing deviceIds). Make sure the deviceId you set is sufficiently unique
  * (we recommend something like a UUID - see src/uuid.js for an example of how to generate) to prevent conflicts with other devices in our system.
  * @public
  * @param {string} deviceId - custom deviceId for current user.
  * @example amplitudeClient.setDeviceId('45f0954f-eb79-4463-ac8a-233a6f45a8f0');
  */
AmplitudeClient.prototype.setDeviceId = function setDeviceId(deviceId) {
  if (!utils.validateInput(deviceId, 'deviceId', 'string')) {
    return;
  }

  try {
    if (!utils.isEmptyString(deviceId)) {
      this.options.deviceId = '' + deviceId;
      _saveCookieData(this);
    }
  } catch (e) {
    utils.log.error(e);
  }
};

/**
 * Sets user properties for the current user.
 * @public
 * @param {object} - object with string keys and values for the user properties to set.
 * @param {boolean} - DEPRECATED opt_replace: in earlier versions of the JS SDK the user properties object was kept in
 * memory and replace = true would replace the object in memory. Now the properties are no longer stored in memory, so replace is deprecated.
 * @example amplitudeClient.setUserProperties({'gender': 'female', 'sign_up_complete': true})
 */
AmplitudeClient.prototype.setUserProperties = function setUserProperties(userProperties) {
  if (!this._apiKeySet('setUserProperties()') || !utils.validateInput(userProperties, 'userProperties', 'object')) {
    return;
  }
  // sanitize the userProperties dict before converting into identify
  var sanitized = utils.truncate(utils.validateProperties(userProperties));
  if (Object.keys(sanitized).length === 0) {
    return;
  }

  // convert userProperties into an identify call
  var identify = new Identify();
  for (var property in sanitized) {
    if (sanitized.hasOwnProperty(property)) {
      identify.set(property, sanitized[property]);
    }
  }
  this.identify(identify);
};

/**
 * Clear all of the user properties for the current user. Note: clearing user properties is irreversible!
 * @public
 * @example amplitudeClient.clearUserProperties();
 */
AmplitudeClient.prototype.clearUserProperties = function clearUserProperties() {
  if (!this._apiKeySet('clearUserProperties()')) {
    return;
  }

  var identify = new Identify();
  identify.clearAll();
  this.identify(identify);
};

/**
 * Applies the proxied functions on the proxied object to an instance of the real object.
 * Used to convert proxied Identify and Revenue objects.
 * @private
 */
var _convertProxyObjectToRealObject = function _convertProxyObjectToRealObject(instance, proxy) {
  for (var i = 0; i < proxy._q.length; i++) {
    var fn = instance[proxy._q[i][0]];
    if (type(fn) === 'function') {
      fn.apply(instance, proxy._q[i].slice(1));
    }
  }
  return instance;
};

/**
 * Send an identify call containing user property operations to Amplitude servers.
 * See [Readme]{@link https://github.com/amplitude/Amplitude-Javascript#user-properties-and-user-property-operations}
 * for more information on the Identify API and user property operations.
 * @param {Identify} identify_obj - the Identify object containing the user property operations to send.
 * @param {Amplitude~eventCallback} opt_callback - (optional) callback function to run when the identify event has been sent.
 * Note: the server response code and response body from the identify event upload are passed to the callback function.
 * @example
 * var identify = new amplitude.Identify().set('colors', ['rose', 'gold']).add('karma', 1).setOnce('sign_up_date', '2016-03-31');
 * amplitude.identify(identify);
 */
AmplitudeClient.prototype.identify = function (identify_obj, opt_callback) {
  if (!this._apiKeySet('identify()')) {
    if (type(opt_callback) === 'function') {
      opt_callback(0, 'No request sent', { reason: 'API key is not set' });
    }
    return;
  }

  // if identify input is a proxied object created by the async loading snippet, convert it into an identify object
  if (type(identify_obj) === 'object' && identify_obj.hasOwnProperty('_q')) {
    identify_obj = _convertProxyObjectToRealObject(new Identify(), identify_obj);
  }

  if (identify_obj instanceof Identify) {
    // only send if there are operations
    if (Object.keys(identify_obj.userPropertiesOperations).length > 0) {
      return this._logEvent(constants.IDENTIFY_EVENT, null, null, identify_obj.userPropertiesOperations, null, null, null, opt_callback);
    } else {
      if (type(opt_callback) === 'function') {
        opt_callback(0, 'No request sent', { reason: 'No user property operations' });
      }
    }
  } else {
    utils.log.error('Invalid identify input type. Expected Identify object but saw ' + type(identify_obj));
    if (type(opt_callback) === 'function') {
      opt_callback(0, 'No request sent', { reason: 'Invalid identify input type' });
    }
  }
};

AmplitudeClient.prototype.groupIdentify = function (group_type, group_name, identify_obj, opt_callback) {
  if (!this._apiKeySet('groupIdentify()')) {
    if (type(opt_callback) === 'function') {
      opt_callback(0, 'No request sent', { reason: 'API key is not set' });
    }
    return;
  }

  if (!utils.validateInput(group_type, 'group_type', 'string') || utils.isEmptyString(group_type)) {
    if (type(opt_callback) === 'function') {
      opt_callback(0, 'No request sent', { reason: 'Invalid group type' });
    }
    return;
  }

  if (group_name === null || group_name === undefined) {
    if (type(opt_callback) === 'function') {
      opt_callback(0, 'No request sent', { reason: 'Invalid group name' });
    }
    return;
  }

  // if identify input is a proxied object created by the async loading snippet, convert it into an identify object
  if (type(identify_obj) === 'object' && identify_obj.hasOwnProperty('_q')) {
    identify_obj = _convertProxyObjectToRealObject(new Identify(), identify_obj);
  }

  if (identify_obj instanceof Identify) {
    // only send if there are operations
    if (Object.keys(identify_obj.userPropertiesOperations).length > 0) {
      return this._logEvent(constants.GROUP_IDENTIFY_EVENT, null, null, null, _defineProperty({}, group_type, group_name), identify_obj.userPropertiesOperations, null, opt_callback);
    } else {
      if (type(opt_callback) === 'function') {
        opt_callback(0, 'No request sent', { reason: 'No group property operations' });
      }
    }
  } else {
    utils.log.error('Invalid identify input type. Expected Identify object but saw ' + type(identify_obj));
    if (type(opt_callback) === 'function') {
      opt_callback(0, 'No request sent', { reason: 'Invalid identify input type' });
    }
  }
};

/**
 * Set a versionName for your application.
 * @public
 * @param {string} versionName - The version to set for your application.
 * @example amplitudeClient.setVersionName('1.12.3');
 */
AmplitudeClient.prototype.setVersionName = function setVersionName(versionName) {
  if (!utils.validateInput(versionName, 'versionName', 'string')) {
    return;
  }
  this.options.versionName = versionName;
};

/**
 * Private logEvent method. Keeps apiProperties from being publicly exposed.
 * @private
 */
AmplitudeClient.prototype._logEvent = function _logEvent(eventType, eventProperties, apiProperties, userProperties, groups, groupProperties, timestamp, callback) {
  _loadCookieData(this); // reload cookie before each log event to sync event meta-data between windows and tabs
  if (!eventType) {
    if (type(callback) === 'function') {
      callback(0, 'No request sent', { reason: 'Missing eventType' });
    }
    return;
  }
  if (this.options.optOut) {
    if (type(callback) === 'function') {
      callback(0, 'No request sent', { reason: 'optOut is set to true' });
    }
    return;
  }

  try {
    var eventId;
    if (eventType === constants.IDENTIFY_EVENT || eventType === constants.GROUP_IDENTIFY_EVENT) {
      eventId = this.nextIdentifyId();
    } else {
      eventId = this.nextEventId();
    }
    var sequenceNumber = this.nextSequenceNumber();
    var eventTime = type(timestamp) === 'number' ? timestamp : new Date().getTime();
    if (!this._sessionId || !this._lastEventTime || eventTime - this._lastEventTime > this.options.sessionTimeout) {
      this._sessionId = eventTime;
    }
    this._lastEventTime = eventTime;
    _saveCookieData(this);

    userProperties = userProperties || {};
    var trackingOptions = merge_1$1({}, this._apiPropertiesTrackingOptions);
    apiProperties = merge_1$1(trackingOptions, apiProperties || {});
    eventProperties = eventProperties || {};
    groups = groups || {};
    var event = {
      device_id: this.options.deviceId,
      user_id: this.options.userId,
      timestamp: eventTime,
      event_id: eventId,
      session_id: this._sessionId || -1,
      event_type: eventType,
      version_name: _shouldTrackField(this, 'version_name') ? this.options.versionName || null : null,
      platform: _shouldTrackField(this, 'platform') ? this.options.platform : null,
      os_name: _shouldTrackField(this, 'os_name') ? this._ua.browser.name || null : null,
      os_version: _shouldTrackField(this, 'os_version') ? this._ua.browser.major || null : null,
      device_model: _shouldTrackField(this, 'device_model') ? this._ua.os.name || null : null,
      language: _shouldTrackField(this, 'language') ? this.options.language : null,
      api_properties: apiProperties,
      event_properties: utils.truncate(utils.validateProperties(eventProperties)),
      user_properties: utils.truncate(utils.validateProperties(userProperties)),
      uuid: uuid$1(),
      library: {
        name: 'amplitude-js',
        version: version
      },
      sequence_number: sequenceNumber, // for ordering events and identifys
      groups: utils.truncate(utils.validateGroups(groups)),
      group_properties: utils.truncate(utils.validateProperties(groupProperties)),
      user_agent: this._userAgent
    };

    if (eventType === constants.IDENTIFY_EVENT || eventType === constants.GROUP_IDENTIFY_EVENT) {
      this._unsentIdentifys.push(event);
      this._limitEventsQueued(this._unsentIdentifys);
    } else {
      this._unsentEvents.push(event);
      this._limitEventsQueued(this._unsentEvents);
    }

    if (this.options.saveEvents) {
      this.saveEvents();
    }

    if (!this._sendEventsIfReady(callback) && type(callback) === 'function') {
      callback(0, 'No request sent', { reason: 'No events to send or upload queued' });
    }

    return eventId;
  } catch (e) {
    utils.log.error(e);
  }
};

var _shouldTrackField = function _shouldTrackField(scope, field) {
  return !!scope.options.trackingOptions[field];
};

var _generateApiPropertiesTrackingConfig = function _generateApiPropertiesTrackingConfig(scope) {
  // to limit size of config payload, only send fields that have been disabled
  var fields = ['city', 'country', 'dma', 'ip_address', 'region'];
  var config = {};
  for (var i = 0; i < fields.length; i++) {
    var field = fields[i];
    if (!_shouldTrackField(scope, field)) {
      config[field] = false;
    }
  }
  return config;
};

/**
 * Remove old events from the beginning of the array if too many have accumulated. Default limit is 1000 events.
 * @private
 */
AmplitudeClient.prototype._limitEventsQueued = function _limitEventsQueued(queue) {
  if (queue.length > this.options.savedMaxCount) {
    queue.splice(0, queue.length - this.options.savedMaxCount);
  }
};

/**
 * This is the callback for logEvent and identify calls. It gets called after the event/identify is uploaded,
 * and the server response code and response body from the upload request are passed to the callback function.
 * @callback Amplitude~eventCallback
 * @param {number} responseCode - Server response code for the event / identify upload request.
 * @param {string} responseBody - Server response body for the event / identify upload request.
 */

/**
 * Log an event with eventType and eventProperties
 * @public
 * @param {string} eventType - name of event
 * @param {object} eventProperties - (optional) an object with string keys and values for the event properties.
 * @param {Amplitude~eventCallback} opt_callback - (optional) a callback function to run after the event is logged.
 * Note: the server response code and response body from the event upload are passed to the callback function.
 * @example amplitudeClient.logEvent('Clicked Homepage Button', {'finished_flow': false, 'clicks': 15});
 */
AmplitudeClient.prototype.logEvent = function logEvent(eventType, eventProperties, opt_callback) {
  return this.logEventWithTimestamp(eventType, eventProperties, null, opt_callback);
};

/**
 * Log an event with eventType and eventProperties and a custom timestamp
 * @public
 * @param {string} eventType - name of event
 * @param {object} eventProperties - (optional) an object with string keys and values for the event properties.
 * @param {number} timesatmp - (optional) the custom timestamp as milliseconds since epoch.
 * @param {Amplitude~eventCallback} opt_callback - (optional) a callback function to run after the event is logged.
 * Note: the server response code and response body from the event upload are passed to the callback function.
 * @example amplitudeClient.logEvent('Clicked Homepage Button', {'finished_flow': false, 'clicks': 15});
 */
AmplitudeClient.prototype.logEventWithTimestamp = function logEvent(eventType, eventProperties, timestamp, opt_callback) {
  if (!this._apiKeySet('logEvent()')) {
    if (type(opt_callback) === 'function') {
      opt_callback(0, 'No request sent', { reason: 'API key not set' });
    }
    return -1;
  }
  if (!utils.validateInput(eventType, 'eventType', 'string')) {
    if (type(opt_callback) === 'function') {
      opt_callback(0, 'No request sent', { reason: 'Invalid type for eventType' });
    }
    return -1;
  }
  if (utils.isEmptyString(eventType)) {
    if (type(opt_callback) === 'function') {
      opt_callback(0, 'No request sent', { reason: 'Missing eventType' });
    }
    return -1;
  }
  return this._logEvent(eventType, eventProperties, null, null, null, null, timestamp, opt_callback);
};

/**
 * Log an event with eventType, eventProperties, and groups. Use this to set event-level groups.
 * Note: the group(s) set only apply for the specific event type being logged and does not persist on the user
 * (unless you explicitly set it with setGroup).
 * See the [SDK Readme]{@link https://github.com/amplitude/Amplitude-Javascript#setting-groups} for more information
 * about groups and Count by Distinct on the Amplitude platform.
 * @public
 * @param {string} eventType - name of event
 * @param {object} eventProperties - (optional) an object with string keys and values for the event properties.
 * @param {object} groups - (optional) an object with string groupType: groupName values for the event being logged.
 * groupName can be a string or an array of strings.
 * @param {Amplitude~eventCallback} opt_callback - (optional) a callback function to run after the event is logged.
 * Note: the server response code and response body from the event upload are passed to the callback function.
 * @example amplitudeClient.logEventWithGroups('Clicked Button', null, {'orgId': 24});
 */
AmplitudeClient.prototype.logEventWithGroups = function (eventType, eventProperties, groups, opt_callback) {
  if (!this._apiKeySet('logEventWithGroups()')) {
    if (type(opt_callback) === 'function') {
      opt_callback(0, 'No request sent', { reason: 'API key not set' });
    }
    return -1;
  }
  if (!utils.validateInput(eventType, 'eventType', 'string')) {
    if (type(opt_callback) === 'function') {
      opt_callback(0, 'No request sent', { reason: 'Invalid type for eventType' });
    }
    return -1;
  }
  return this._logEvent(eventType, eventProperties, null, null, groups, null, null, opt_callback);
};

/**
 * Test that n is a number or a numeric value.
 * @private
 */
var _isNumber = function _isNumber(n) {
  return !isNaN(parseFloat(n)) && isFinite(n);
};

/**
 * Log revenue with Revenue interface. The new revenue interface allows for more revenue fields like
 * revenueType and event properties.
 * See [Readme]{@link https://github.com/amplitude/Amplitude-Javascript#tracking-revenue}
 * for more information on the Revenue interface and logging revenue.
 * @public
 * @param {Revenue} revenue_obj - the revenue object containing the revenue data being logged.
 * @example var revenue = new amplitude.Revenue().setProductId('productIdentifier').setPrice(10.99);
 * amplitude.logRevenueV2(revenue);
 */
AmplitudeClient.prototype.logRevenueV2 = function logRevenueV2(revenue_obj) {
  if (!this._apiKeySet('logRevenueV2()')) {
    return;
  }

  // if revenue input is a proxied object created by the async loading snippet, convert it into an revenue object
  if (type(revenue_obj) === 'object' && revenue_obj.hasOwnProperty('_q')) {
    revenue_obj = _convertProxyObjectToRealObject(new Revenue(), revenue_obj);
  }

  if (revenue_obj instanceof Revenue) {
    // only send if revenue is valid
    if (revenue_obj && revenue_obj._isValidRevenue()) {
      return this.logEvent(constants.REVENUE_EVENT, revenue_obj._toJSONObject());
    }
  } else {
    utils.log.error('Invalid revenue input type. Expected Revenue object but saw ' + type(revenue_obj));
  }
};

/**
 * Log revenue event with a price, quantity, and product identifier. DEPRECATED - use logRevenueV2
 * @public
 * @deprecated
 * @param {number} price - price of revenue event
 * @param {number} quantity - (optional) quantity of products in revenue event. If no quantity specified default to 1.
 * @param {string} product - (optional) product identifier
 * @example amplitudeClient.logRevenue(3.99, 1, 'product_1234');
 */
AmplitudeClient.prototype.logRevenue = function logRevenue(price, quantity, product) {
  // Test that the parameters are of the right type.
  if (!this._apiKeySet('logRevenue()') || !_isNumber(price) || quantity !== undefined && !_isNumber(quantity)) {
    // utils.log('Price and quantity arguments to logRevenue must be numbers');
    return -1;
  }

  return this._logEvent(constants.REVENUE_EVENT, {}, {
    productId: product,
    special: 'revenue_amount',
    quantity: quantity || 1,
    price: price
  }, null, null, null, null, null);
};

/**
 * Remove events in storage with event ids up to and including maxEventId.
 * @private
 */
AmplitudeClient.prototype.removeEvents = function removeEvents(maxEventId, maxIdentifyId) {
  _removeEvents(this, '_unsentEvents', maxEventId);
  _removeEvents(this, '_unsentIdentifys', maxIdentifyId);
};

/**
 * Helper function to remove events up to maxId from a single queue.
 * Does a true filter in case events get out of order or old events are removed.
 * @private
 */
var _removeEvents = function _removeEvents(scope, eventQueue, maxId) {
  if (maxId < 0) {
    return;
  }

  var filteredEvents = [];
  for (var i = 0; i < scope[eventQueue].length || 0; i++) {
    if (scope[eventQueue][i].event_id > maxId) {
      filteredEvents.push(scope[eventQueue][i]);
    }
  }
  scope[eventQueue] = filteredEvents;
};

/**
 * Send unsent events. Note: this is called automatically after events are logged if option batchEvents is false.
 * If batchEvents is true, then events are only sent when batch criterias are met.
 * @private
 * @param {Amplitude~eventCallback} callback - (optional) callback to run after events are sent.
 * Note the server response code and response body are passed to the callback as input arguments.
 */
AmplitudeClient.prototype.sendEvents = function sendEvents(callback) {
  if (!this._apiKeySet('sendEvents()')) {
    if (type(callback) === 'function') {
      callback(0, 'No request sent', { reason: 'API key not set' });
    }
    return;
  }
  if (this.options.optOut) {
    if (type(callback) === 'function') {
      callback(0, 'No request sent', { reason: 'optOut is set to true' });
    }
    return;
  }
  if (this._unsentCount() === 0) {
    if (type(callback) === 'function') {
      callback(0, 'No request sent', { reason: 'No events to send' });
    }
    return;
  }
  if (this._sending) {
    if (type(callback) === 'function') {
      callback(0, 'No request sent', { reason: 'Request already in progress' });
    }
    return;
  }

  this._sending = true;
  var protocol = this.options.forceHttps ? 'https' : 'https:' === window.location.protocol ? 'https' : 'http';
  var url = protocol + '://' + this.options.apiEndpoint + '/';

  // fetch events to send
  var numEvents = Math.min(this._unsentCount(), this.options.uploadBatchSize);
  var mergedEvents = this._mergeEventsAndIdentifys(numEvents);
  var maxEventId = mergedEvents.maxEventId;
  var maxIdentifyId = mergedEvents.maxIdentifyId;
  var events = JSON.stringify(mergedEvents.eventsToSend);
  var uploadTime = new Date().getTime();

  var data = {
    client: this.options.apiKey,
    e: events,
    v: constants.API_VERSION,
    upload_time: uploadTime,
    checksum: md5(constants.API_VERSION + this.options.apiKey + events + uploadTime)
  };

  var scope = this;
  new Request(url, data).send(function (status, response) {
    scope._sending = false;
    try {
      if (status === 200 && response === 'success') {
        scope.removeEvents(maxEventId, maxIdentifyId);

        // Update the event cache after the removal of sent events.
        if (scope.options.saveEvents) {
          scope.saveEvents();
        }

        // Send more events if any queued during previous send.
        if (!scope._sendEventsIfReady(callback) && type(callback) === 'function') {
          callback(status, response);
        }

        // handle payload too large
      } else if (status === 413) {
        // utils.log('request too large');
        // Can't even get this one massive event through. Drop it, even if it is an identify.
        if (scope.options.uploadBatchSize === 1) {
          scope.removeEvents(maxEventId, maxIdentifyId);
        }

        // The server complained about the length of the request. Backoff and try again.
        scope.options.uploadBatchSize = Math.ceil(numEvents / 2);
        scope.sendEvents(callback);
      } else if (type(callback) === 'function') {
        // If server turns something like a 400
        callback(status, response);
      }
    } catch (e) {
      // utils.log('failed upload');
    }
  });
};

/**
 * Merge unsent events and identifys together in sequential order based on their sequence number, for uploading.
 * @private
 */
AmplitudeClient.prototype._mergeEventsAndIdentifys = function _mergeEventsAndIdentifys(numEvents) {
  // coalesce events from both queues
  var eventsToSend = [];
  var eventIndex = 0;
  var maxEventId = -1;
  var identifyIndex = 0;
  var maxIdentifyId = -1;

  while (eventsToSend.length < numEvents) {
    var event;
    var noIdentifys = identifyIndex >= this._unsentIdentifys.length;
    var noEvents = eventIndex >= this._unsentEvents.length;

    // case 0: no events or identifys left
    // note this should not happen, this means we have less events and identifys than expected
    if (noEvents && noIdentifys) {
      utils.log.error('Merging Events and Identifys, less events and identifys than expected');
      break;
    }

    // case 1: no identifys - grab from events
    else if (noIdentifys) {
        event = this._unsentEvents[eventIndex++];
        maxEventId = event.event_id;

        // case 2: no events - grab from identifys
      } else if (noEvents) {
        event = this._unsentIdentifys[identifyIndex++];
        maxIdentifyId = event.event_id;

        // case 3: need to compare sequence numbers
      } else {
        // events logged before v2.5.0 won't have a sequence number, put those first
        if (!('sequence_number' in this._unsentEvents[eventIndex]) || this._unsentEvents[eventIndex].sequence_number < this._unsentIdentifys[identifyIndex].sequence_number) {
          event = this._unsentEvents[eventIndex++];
          maxEventId = event.event_id;
        } else {
          event = this._unsentIdentifys[identifyIndex++];
          maxIdentifyId = event.event_id;
        }
      }

    eventsToSend.push(event);
  }

  return {
    eventsToSend: eventsToSend,
    maxEventId: maxEventId,
    maxIdentifyId: maxIdentifyId
  };
};

/**
 * Set global user properties. Note this is deprecated, and we recommend using setUserProperties
 * @public
 * @deprecated
 */
AmplitudeClient.prototype.setGlobalUserProperties = function setGlobalUserProperties(userProperties) {
  this.setUserProperties(userProperties);
};

/**
 * Get the current version of Amplitude's Javascript SDK.
 * @public
 * @returns {number} version number
 * @example var amplitudeVersion = amplitude.__VERSION__;
 */
AmplitudeClient.prototype.__VERSION__ = version;

/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeKeys = _overArg(Object.keys, Object);

var _nativeKeys = nativeKeys;

/** Used for built-in method references. */
var objectProto$12 = Object.prototype;

/** Used to check objects for own properties. */
var hasOwnProperty$11 = objectProto$12.hasOwnProperty;

/**
 * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
 *
 * @private
 * @param {Object} object The object to query.
 * @returns {Array} Returns the array of property names.
 */
function baseKeys(object) {
  if (!_isPrototype(object)) {
    return _nativeKeys(object);
  }
  var result = [];
  for (var key in Object(object)) {
    if (hasOwnProperty$11.call(object, key) && key != 'constructor') {
      result.push(key);
    }
  }
  return result;
}

var _baseKeys = baseKeys;

/**
 * Creates an array of the own enumerable property names of `object`.
 *
 * **Note:** Non-object values are coerced to objects. See the
 * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
 * for more details.
 *
 * @static
 * @since 0.1.0
 * @memberOf _
 * @category Object
 * @param {Object} object The object to query.
 * @returns {Array} Returns the array of property names.
 * @example
 *
 * function Foo() {
 *   this.a = 1;
 *   this.b = 2;
 * }
 *
 * Foo.prototype.c = 3;
 *
 * _.keys(new Foo);
 * // => ['a', 'b'] (iteration order is not guaranteed)
 *
 * _.keys('hi');
 * // => ['0', '1']
 */
function keys(object) {
  return isArrayLike_1(object) ? _arrayLikeKeys(object) : _baseKeys(object);
}

var keys_1 = keys;

/** Used for built-in method references. */
var objectProto$11 = Object.prototype;

/** Used to check objects for own properties. */
var hasOwnProperty$10 = objectProto$11.hasOwnProperty;

/**
 * Assigns own enumerable string keyed properties of source objects to the
 * destination object. Source objects are applied from left to right.
 * Subsequent sources overwrite property assignments of previous sources.
 *
 * **Note:** This method mutates `object` and is loosely based on
 * [`Object.assign`](https://mdn.io/Object/assign).
 *
 * @static
 * @memberOf _
 * @since 0.10.0
 * @category Object
 * @param {Object} object The destination object.
 * @param {...Object} [sources] The source objects.
 * @returns {Object} Returns `object`.
 * @see _.assignIn
 * @example
 *
 * function Foo() {
 *   this.a = 1;
 * }
 *
 * function Bar() {
 *   this.c = 3;
 * }
 *
 * Foo.prototype.b = 2;
 * Bar.prototype.d = 4;
 *
 * _.assign({ 'a': 0 }, new Foo, new Bar);
 * // => { 'a': 1, 'c': 3 }
 */
var assign = _createAssigner(function(object, source) {
  if (_isPrototype(source) || isArrayLike_1(source)) {
    _copyObject(source, keys_1(source), object);
    return;
  }
  for (var key in source) {
    if (hasOwnProperty$10.call(source, key)) {
      _assignValue(object, key, source[key]);
    }
  }
});

var assign_1$1 = assign;

/**
 * Amplitude SDK API - instance manager.
 * Function calls directly on amplitude have been deprecated. Please call methods on the default shared instance: amplitude.getInstance() instead.
 * See [Readme]{@link https://github.com/amplitude/Amplitude-Javascript#300-update-and-logging-events-to-multiple-amplitude-apps} for more information about this change.
 * @constructor Amplitude
 * @public
 * @example var amplitude = new Amplitude();
 */
var Amplitude = function Amplitude() {
  this.options = assign_1$1({}, DEFAULT_OPTIONS);
  this._q = [];
  this._instances = {}; // mapping of instance names to instances
};

Amplitude.prototype.Identify = Identify;
Amplitude.prototype.Revenue = Revenue;

Amplitude.prototype.getInstance = function getInstance(instance) {
  instance = utils.isEmptyString(instance) ? constants.DEFAULT_INSTANCE : instance.toLowerCase();
  var client = this._instances[instance];
  if (client === undefined) {
    client = new AmplitudeClient(instance);
    this._instances[instance] = client;
  }
  return client;
};

/**
 * Initializes the Amplitude Javascript SDK with your apiKey and any optional configurations.
 * This is required before any other methods can be called.
 * @public
 * @param {string} apiKey - The API key for your app.
 * @param {string} opt_userId - (optional) An identifier for this user.
 * @param {object} opt_config - (optional) Configuration options.
 * See [Readme]{@link https://github.com/amplitude/Amplitude-Javascript#configuration-options} for list of options and default values.
 * @param {function} opt_callback - (optional) Provide a callback function to run after initialization is complete.
 * @deprecated Please use amplitude.getInstance().init(apiKey, opt_userId, opt_config, opt_callback);
 * @example amplitude.init('API_KEY', 'USER_ID', {includeReferrer: true, includeUtm: true}, function() { alert('init complete'); });
 */
Amplitude.prototype.init = function init(apiKey, opt_userId, opt_config, opt_callback) {
  this.getInstance().init(apiKey, opt_userId, opt_config, function (instance) {
    // make options such as deviceId available for callback functions
    this.options = instance.options;
    if (type(opt_callback) === 'function') {
      opt_callback(instance);
    }
  }.bind(this));
};

/**
 * Run functions queued up by proxy loading snippet
 * @private
 */
Amplitude.prototype.runQueuedFunctions = function () {
  // run queued up old versions of functions
  for (var i = 0; i < this._q.length; i++) {
    var fn = this[this._q[i][0]];
    if (type(fn) === 'function') {
      fn.apply(this, this._q[i].slice(1));
    }
  }
  this._q = []; // clear function queue after running

  // run queued up functions on instances
  for (var instance in this._instances) {
    if (this._instances.hasOwnProperty(instance)) {
      this._instances[instance].runQueuedFunctions();
    }
  }
};

/**
 * Returns true if a new session was created during initialization, otherwise false.
 * @public
 * @return {boolean} Whether a new session was created during initialization.
 * @deprecated Please use amplitude.getInstance().isNewSession();
 */
Amplitude.prototype.isNewSession = function isNewSession() {
  return this.getInstance().isNewSession();
};

/**
 * Returns the id of the current session.
 * @public
 * @return {number} Id of the current session.
 * @deprecated Please use amplitude.getInstance().getSessionId();
 */
Amplitude.prototype.getSessionId = function getSessionId() {
  return this.getInstance().getSessionId();
};

/**
 * Increments the eventId and returns it.
 * @private
 */
Amplitude.prototype.nextEventId = function nextEventId() {
  return this.getInstance().nextEventId();
};

/**
 * Increments the identifyId and returns it.
 * @private
 */
Amplitude.prototype.nextIdentifyId = function nextIdentifyId() {
  return this.getInstance().nextIdentifyId();
};

/**
 * Increments the sequenceNumber and returns it.
 * @private
 */
Amplitude.prototype.nextSequenceNumber = function nextSequenceNumber() {
  return this.getInstance().nextSequenceNumber();
};

/**
 * Saves unsent events and identifies to localStorage. JSON stringifies event queues before saving.
 * Note: this is called automatically every time events are logged, unless you explicitly set option saveEvents to false.
 * @private
 */
Amplitude.prototype.saveEvents = function saveEvents() {
  this.getInstance().saveEvents();
};

/**
 * Sets a customer domain for the amplitude cookie. Useful if you want to support cross-subdomain tracking.
 * @public
 * @param {string} domain to set.
 * @deprecated Please use amplitude.getInstance().setDomain(domain);
 * @example amplitude.setDomain('.amplitude.com');
 */
Amplitude.prototype.setDomain = function setDomain(domain) {
  this.getInstance().setDomain(domain);
};

/**
 * Sets an identifier for the current user.
 * @public
 * @param {string} userId - identifier to set. Can be null.
 * @deprecated Please use amplitude.getInstance().setUserId(userId);
 * @example amplitude.setUserId('joe@gmail.com');
 */
Amplitude.prototype.setUserId = function setUserId(userId) {
  this.getInstance().setUserId(userId);
};

/**
 * Add user to a group or groups. You need to specify a groupType and groupName(s).
 * For example you can group people by their organization.
 * In that case groupType is "orgId" and groupName would be the actual ID(s).
 * groupName can be a string or an array of strings to indicate a user in multiple gruups.
 * You can also call setGroup multiple times with different groupTypes to track multiple types of groups (up to 5 per app).
 * Note: this will also set groupType: groupName as a user property.
 * See the [SDK Readme]{@link https://github.com/amplitude/Amplitude-Javascript#setting-groups} for more information.
 * @public
 * @param {string} groupType - the group type (ex: orgId)
 * @param {string|list} groupName - the name of the group (ex: 15), or a list of names of the groups
 * @deprecated Please use amplitude.getInstance().setGroup(groupType, groupName);
 * @example amplitude.setGroup('orgId', 15); // this adds the current user to orgId 15.
 */
Amplitude.prototype.setGroup = function (groupType, groupName) {
  this.getInstance().setGroup(groupType, groupName);
};

/**
 * Sets whether to opt current user out of tracking.
 * @public
 * @param {boolean} enable - if true then no events will be logged or sent.
 * @deprecated Please use amplitude.getInstance().setOptOut(enable);
 * @example: amplitude.setOptOut(true);
 */
Amplitude.prototype.setOptOut = function setOptOut(enable) {
  this.getInstance().setOptOut(enable);
};

/**
  * Regenerates a new random deviceId for current user. Note: this is not recommended unless you know what you
  * are doing. This can be used in conjunction with `setUserId(null)` to anonymize users after they log out.
  * With a null userId and a completely new deviceId, the current user would appear as a brand new user in dashboard.
  * This uses src/uuid.js to regenerate the deviceId.
  * @public
  * @deprecated Please use amplitude.getInstance().regenerateDeviceId();
  */
Amplitude.prototype.regenerateDeviceId = function regenerateDeviceId() {
  this.getInstance().regenerateDeviceId();
};

/**
  * Sets a custom deviceId for current user. Note: this is not recommended unless you know what you are doing
  * (like if you have your own system for managing deviceIds). Make sure the deviceId you set is sufficiently unique
  * (we recommend something like a UUID - see src/uuid.js for an example of how to generate) to prevent conflicts with other devices in our system.
  * @public
  * @param {string} deviceId - custom deviceId for current user.
  * @deprecated Please use amplitude.getInstance().setDeviceId(deviceId);
  * @example amplitude.setDeviceId('45f0954f-eb79-4463-ac8a-233a6f45a8f0');
  */
Amplitude.prototype.setDeviceId = function setDeviceId(deviceId) {
  this.getInstance().setDeviceId(deviceId);
};

/**
 * Sets user properties for the current user.
 * @public
 * @param {object} - object with string keys and values for the user properties to set.
 * @param {boolean} - DEPRECATED opt_replace: in earlier versions of the JS SDK the user properties object was kept in
 * memory and replace = true would replace the object in memory. Now the properties are no longer stored in memory, so replace is deprecated.
 * @deprecated Please use amplitude.getInstance.setUserProperties(userProperties);
 * @example amplitude.setUserProperties({'gender': 'female', 'sign_up_complete': true})
 */
Amplitude.prototype.setUserProperties = function setUserProperties(userProperties) {
  this.getInstance().setUserProperties(userProperties);
};

/**
 * Clear all of the user properties for the current user. Note: clearing user properties is irreversible!
 * @public
 * @deprecated Please use amplitude.getInstance().clearUserProperties();
 * @example amplitude.clearUserProperties();
 */
Amplitude.prototype.clearUserProperties = function clearUserProperties() {
  this.getInstance().clearUserProperties();
};

/**
 * Send an identify call containing user property operations to Amplitude servers.
 * See [Readme]{@link https://github.com/amplitude/Amplitude-Javascript#user-properties-and-user-property-operations}
 * for more information on the Identify API and user property operations.
 * @param {Identify} identify_obj - the Identify object containing the user property operations to send.
 * @param {Amplitude~eventCallback} opt_callback - (optional) callback function to run when the identify event has been sent.
 * Note: the server response code and response body from the identify event upload are passed to the callback function.
 * @deprecated Please use amplitude.getInstance().identify(identify);
 * @example
 * var identify = new amplitude.Identify().set('colors', ['rose', 'gold']).add('karma', 1).setOnce('sign_up_date', '2016-03-31');
 * amplitude.identify(identify);
 */
Amplitude.prototype.identify = function (identify_obj, opt_callback) {
  this.getInstance().identify(identify_obj, opt_callback);
};

/**
 * Set a versionName for your application.
 * @public
 * @param {string} versionName - The version to set for your application.
 * @deprecated Please use amplitude.getInstance().setVersionName(versionName);
 * @example amplitude.setVersionName('1.12.3');
 */
Amplitude.prototype.setVersionName = function setVersionName(versionName) {
  this.getInstance().setVersionName(versionName);
};

/**
 * This is the callback for logEvent and identify calls. It gets called after the event/identify is uploaded,
 * and the server response code and response body from the upload request are passed to the callback function.
 * @callback Amplitude~eventCallback
 * @param {number} responseCode - Server response code for the event / identify upload request.
 * @param {string} responseBody - Server response body for the event / identify upload request.
 */

/**
 * Log an event with eventType and eventProperties
 * @public
 * @param {string} eventType - name of event
 * @param {object} eventProperties - (optional) an object with string keys and values for the event properties.
 * @param {Amplitude~eventCallback} opt_callback - (optional) a callback function to run after the event is logged.
 * Note: the server response code and response body from the event upload are passed to the callback function.
 * @deprecated Please use amplitude.getInstance().logEvent(eventType, eventProperties, opt_callback);
 * @example amplitude.logEvent('Clicked Homepage Button', {'finished_flow': false, 'clicks': 15});
 */
Amplitude.prototype.logEvent = function logEvent(eventType, eventProperties, opt_callback) {
  return this.getInstance().logEvent(eventType, eventProperties, opt_callback);
};

/**
 * Log an event with eventType, eventProperties, and groups. Use this to set event-level groups.
 * Note: the group(s) set only apply for the specific event type being logged and does not persist on the user
 * (unless you explicitly set it with setGroup).
 * See the [SDK Readme]{@link https://github.com/amplitude/Amplitude-Javascript#setting-groups} for more information
 * about groups and Count by Distinct on the Amplitude platform.
 * @public
 * @param {string} eventType - name of event
 * @param {object} eventProperties - (optional) an object with string keys and values for the event properties.
 * @param {object} groups - (optional) an object with string groupType: groupName values for the event being logged.
 * groupName can be a string or an array of strings.
 * @param {Amplitude~eventCallback} opt_callback - (optional) a callback function to run after the event is logged.
 * Note: the server response code and response body from the event upload are passed to the callback function.
 * Deprecated Please use amplitude.getInstance().logEventWithGroups(eventType, eventProperties, groups, opt_callback);
 * @example amplitude.logEventWithGroups('Clicked Button', null, {'orgId': 24});
 */
Amplitude.prototype.logEventWithGroups = function (eventType, eventProperties, groups, opt_callback) {
  return this.getInstance().logEventWithGroups(eventType, eventProperties, groups, opt_callback);
};

/**
 * Log revenue with Revenue interface. The new revenue interface allows for more revenue fields like
 * revenueType and event properties.
 * See [Readme]{@link https://github.com/amplitude/Amplitude-Javascript#tracking-revenue}
 * for more information on the Revenue interface and logging revenue.
 * @public
 * @param {Revenue} revenue_obj - the revenue object containing the revenue data being logged.
 * @deprecated Please use amplitude.getInstance().logRevenueV2(revenue_obj);
 * @example var revenue = new amplitude.Revenue().setProductId('productIdentifier').setPrice(10.99);
 * amplitude.logRevenueV2(revenue);
 */
Amplitude.prototype.logRevenueV2 = function logRevenueV2(revenue_obj) {
  return this.getInstance().logRevenueV2(revenue_obj);
};

/**
 * Log revenue event with a price, quantity, and product identifier. DEPRECATED - use logRevenueV2
 * @public
 * @param {number} price - price of revenue event
 * @param {number} quantity - (optional) quantity of products in revenue event. If no quantity specified default to 1.
 * @param {string} product - (optional) product identifier
 * @deprecated Please use amplitude.getInstance().logRevenueV2(revenue_obj);
 * @example amplitude.logRevenue(3.99, 1, 'product_1234');
 */
Amplitude.prototype.logRevenue = function logRevenue(price, quantity, product) {
  return this.getInstance().logRevenue(price, quantity, product);
};

/**
 * Remove events in storage with event ids up to and including maxEventId.
 * @private
 */
Amplitude.prototype.removeEvents = function removeEvents(maxEventId, maxIdentifyId) {
  this.getInstance().removeEvents(maxEventId, maxIdentifyId);
};

/**
 * Send unsent events. Note: this is called automatically after events are logged if option batchEvents is false.
 * If batchEvents is true, then events are only sent when batch criterias are met.
 * @private
 * @param {Amplitude~eventCallback} callback - (optional) callback to run after events are sent.
 * Note the server response code and response body are passed to the callback as input arguments.
 */
Amplitude.prototype.sendEvents = function sendEvents(callback) {
  this.getInstance().sendEvents(callback);
};

/**
 * Set global user properties. Note this is deprecated, and we recommend using setUserProperties
 * @public
 * @deprecated
 */
Amplitude.prototype.setGlobalUserProperties = function setGlobalUserProperties(userProperties) {
  this.getInstance().setUserProperties(userProperties);
};

/**
 * Get the current version of Amplitude's Javascript SDK.
 * @public
 * @returns {number} version number
 * @example var amplitudeVersion = amplitude.__VERSION__;
 */
Amplitude.prototype.__VERSION__ = version;

/* jshint expr:true */
var old = window.amplitude || {};
var newInstance = new Amplitude();
newInstance._q = old._q || [];
for (var instance in old._iq) {
  // migrate each instance's queue
  if (old._iq.hasOwnProperty(instance)) {
    newInstance.getInstance(instance)._q = old._iq[instance]._q || [];
  }
}

return newInstance;

})));