delegate.min.js.map

{"version":3,"file":"delegate.min.js","sources":["createEvent.js","utils/isString.js","utils/isElement.js","getListeners.js","enum.js","_off.js","_delete.js","purgeElement.js","utils/isFunction.js","utils/_typeof.js","off.js","at.js","matches.js","getParentOrHost.js","resolveTextNode.js","getTarget.js","on.js","closest.js","utils/isIE.js","getTypes.js","getScroll.js","getPageX.js","getScrollLeft.js","getPageY.js","getScrollTop.js","getCharCode.js","utils/isAppleSafari.js","preventDefault.js","stopPropagation.js","stopEvent.js","emitter.js","hasEvent.js","getPageXY.js","getRelatedTarget.js","destroy.js","only.js","once.js","focusin.js","focusout.js","trigger.js","stopImmediate.js","delegate.js"],"sourcesContent":["/**\n * 创建自定义事件（CustomerEvent）\n * ========================================================================\n * @method createEvent\n * @param {String} type - （必须）事件类型（名称）\n * @param {Object} [detail] - （可选）传递给自定义事件的数据，默认为 null\n * @param {Boolean} [bubbles] - （可选）是否支持冒泡，默认为 true\n * @param {Boolean} [cancelable] - （可选）是否可以取消，默认为 true\n * @returns {CustomEvent} - CustomerEvent 实例\n *\n * @example\n * <div id=\"nav\" class=\"nav\">\n *   <a id=\"service\" class=\"anchor\" href=\"https://www.yaohaixiao.com/serivce\">Service</a>\n *   <a id=\"help\" class=\"anchor\" href=\"https://www.yaohaixiao.com/help\">Help</a>\n * </div>\n *\n * const $nav = document.querySelector('#nav')\n * const logEvent = createEvent('log', {\n *   name: 'Yao',\n *   hi() {\n *     console.log('hi！！！')\n *   }\n * })\n *\n * const logHandler = function(evt) {\n *   console.log('detail', evt.detail)\n *   console.log('type', evt.type)\n * }\n *\n * $nav.addEventListener('log', logHandler)\n *\n * $nav.dispatchEvent(logEvent)\n */\nconst createEvent = (\n  type,\n  detail = null,\n  bubbles = true,\n  cancelable = true\n) => {\n  return new CustomEvent(type, {\n    detail: detail,\n    bubbles: bubbles,\n    cancelable: cancelable\n  })\n}\n\nexport default createEvent\n","/**\n * 判断是否为 String 类型值\n * ========================================================================\n * @method isString\n * @param {*} val - （必须）待检测的字符串\n * @returns {Boolean}\n */\nconst isString = (val) => {\n  return typeof val === 'string'\n}\n\nexport default isString\n","/**\n * 检测是否为 HTMLElement 元素节点\n * ========================================================================\n * @method isElement\n * @param {*|HTMLElement} el - （必须）待检测的数据（DOM 元素）\n * @returns {Boolean}\n */\nconst isElement = (el) => {\n  return !!(el && el.nodeName && el.tagName && el.nodeType === 1)\n}\n\nexport default isElement\n","import isString from './utils/isString'\n\n/**\n * 获取 DOM 元素（type 事件类型）事件绑定信息\n * ========================================================================\n * 如果设置了事件类型 type， 则返回指定类型的事件绑定信息，否则返回所有事件绑定信息\n * ========================================================================\n * @methods getListeners\n * @param {HTMLElement} el - （必须）要获取事件绑定信息的 DOM 元素\n * @param {String} [type] - （可选）事件类型\n * @returns {Array} - 已绑定的事件信息\n */\nconst getListeners = (el, type) => {\n  let listeners = el._listeners || []\n\n  if (isString(type) && type) {\n    listeners = listeners.filter((listener) => {\n      return listener.type === type\n    })\n  }\n\n  return listeners\n}\n\nexport default getListeners\n","export const CAPTURE_EVENTS = [\n  'focusout',\n  'blur',\n  'focusin',\n  'focus',\n  'load',\n  'unload',\n  'mouseenter',\n  'mouseleave'\n]\n","import { CAPTURE_EVENTS } from './enum'\nimport _delete from './_delete'\n\n/**\n * （私有方法）取消 type 类型的代理事件绑定\n * ========================================================================\n * 如果没有设置 handler，则销毁 this.$options 绑定的所有符合 type 事件类型的事件绑定\n * ========================================================================\n * @method _off\n * @param {HTMLElement} el - （必须）取消事件绑定的 DOM 元素\n * @param {String} type - （必须）事件类型\n * @param {Function} fn - （必须）事件处理器回调函数\n * @private\n */\nconst _off = (el, type, fn) => {\n  const capture = CAPTURE_EVENTS.indexOf(type) > -1\n\n  /* istanbul ignore else */\n  if (fn._delegateListener) {\n    fn = fn._delegateListener\n    delete fn._delegateListener\n  }\n\n  // 移除缓存的 _listeners 数据\n  _delete(el, type, fn)\n\n  el.removeEventListener(type, fn, capture)\n}\n\nexport default _off\n","/**\n * 删除 DOM 元素缓存的 _listeners 数据\n * ========================================================================\n * @method _delete\n * @param {HTMLElement} el - 要删除 listener 的 DOM 元素\n * @param {String} type - 事件类型（名称）\n * @param {Function} [fn] - 事件处理器回调函数\n */\nconst _delete = function (el, type, fn) {\n  const listeners = el._listeners\n  let index = -1\n\n  if (listeners.length < 1) {\n    return false\n  }\n\n  // 移除缓存的 _listeners 数据\n  listeners.forEach((listener, i) => {\n    const handler = listener.fn\n\n    if (type === listener.type) {\n      index = i\n\n      if (handler === fn) {\n        index = i\n      }\n    }\n  })\n\n  /* istanbul ignore else */\n  if (index > -1) {\n    listeners.splice(index, 1)\n  }\n}\n\nexport default _delete\n","import isString from './utils/isString'\nimport isElement from './utils/isElement'\nimport getListeners from './getListeners'\nimport _off from './_off'\n\n/**\n * 销毁（type 类型的）代理事件绑定\n * ========================================================================\n * 1. 设置了事件类型 type，则销毁指定类型的事件绑定，否则清除所有代理事件绑定\n * 2. recurse 设置为 true，递归销毁子节点全部事件绑定\n * ========================================================================\n * @method purgeElement\n * @param {HTMLElement|String} el - （必须）DOM 元素或者其选择器\n * @param {String|Boolean} type - （必须）事件类型\n * @param {Boolean} [recurse] - （可选）是否递归销毁子节点所有事件绑定\n */\nconst purgeElement = function (el, type, recurse = false) {\n  const $element = isString(el) ? document.querySelector(el) : el\n  const $children = $element.childNodes\n  const listeners = getListeners($element, type)\n\n  listeners.forEach((listener) => {\n    _off($element, listener.type, listener.fn)\n  })\n\n  if (\n    (recurse || type === true || arguments.length === 1) &&\n    $element &&\n    $children\n  ) {\n    $children.forEach(($child) => {\n      if (isElement($child)) {\n        purgeElement($child, type, recurse)\n      }\n    })\n  }\n}\n\nexport default purgeElement\n","import _typeof from './_typeof'\n\n/**\n * 检测测试数据是否为 Function 类型\n * ========================================================================\n * @method isFunction\n * @param {*} val - （必须）待检测的数据\n * @returns {boolean} 'val' 是 Function 类型返回 true，否则返回 false\n */\nconst isFunction = (val) => {\n  return typeof val === 'function' || _typeof(val) === '[object Function]'\n}\n\nexport default isFunction\n","/**\n * 返回检测数据调用 toString() 方法后的字符串，用以判断数据类型。\n * ========================================================================\n * @method _typeof\n * @param {*} val - （必须）待检测的数据\n * @returns {String}\n *\n * @example\n * _typeof({})\n * // => '[object Object]'\n *\n * _typeof(function(){})\n * // => '[object Function]'\n *\n * _typeof([])\n * // => '[object Array]'\n *\n * _typeof('')\n * // => '[object String]'\n *\n * _typeof(2)\n * // => '[object Number]'\n */\nconst _typeof = (val) => {\n  return Object.prototype.toString.apply(val)\n}\n\nexport default _typeof\n","import purgeElement from './purgeElement'\nimport isFunction from './utils/isFunction'\nimport _off from './_off'\n\n/**\n * 取消 type 类型的代理事件绑定\n * ========================================================================\n * 如果没有设置 handler，则销毁 this.$options 绑定的所有符合 type 事件类型的事件绑定\n * ========================================================================\n * @method off\n * @param {HTMLElement} el - （必须）取消事件绑定的 DOM 元素\n * @param {String} type - （必须）事件类型\n * @param {Function} [fn] - （可选）事件处理器回调函数\n */\nconst off = (el, type, fn) => {\n  // 如果不设置 fn 参数，默认清除 el 元素上绑定的所有事件处理器\n  if (!isFunction(fn)) {\n    return purgeElement(el, type)\n  }\n\n  _off(el, type, fn)\n}\n\nexport default off\n","import isFunction from './utils/isFunction'\nimport off from './off'\n\nimport { CAPTURE_EVENTS } from './enum'\n\n/**\n * 绑定事件\n * ========================================================================\n * @method at\n * @param {HTMLElement|String|Object} el - （必须）绑定代理事件的 DOM 节点\n * @param {String|Function} type - （必须）事件类型或者事件处理器回调函数\n * @param {Function|Object} fn - （必须） 事件处理器回调函数或者传递给事件处理器回调函数的数据对象\n * @param {Object} [data] - （可选）传递给事件处理器回调函数的数据对象或者事件处理器回调函数的 this 上下文指向，\n * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向，或者是否仅触发一次\n * 当设置为 true 时，则事件处理器回调函数的 this 上下文指向为 data 对象\n * @param {Boolean} once - （可选）是否仅触发一次\n */\nconst at = (el, type, fn, data, context, once = false) => {\n  // CAPTURE_EVENTS 中的特殊事件，采用事件捕获模型\n  const capture = CAPTURE_EVENTS.indexOf(type) > -1\n  const listener = function (evt) {\n    let overrideContext = context || el\n\n    // 当设置为 true 时，则事件处理器回调函数的\n    // this 上下文指向为 data 对象\n    if (context === true) {\n      overrideContext = data\n    }\n\n    // 仅触发一次\n    /* istanbul ignore else */\n    if (once === true) {\n      off(el, type, listener)\n    }\n\n    fn.call(overrideContext, evt, data)\n  }\n\n  if (!isFunction(fn)) {\n    return false\n  }\n\n  if (!el._listeners) {\n    el._listeners = []\n  }\n\n  // 缓存 options 元素绑定的事件处理器\n  el._listeners.push({\n    el,\n    type,\n    fn: listener,\n    data,\n    context,\n    capture\n  })\n\n  // 缓存包装后的事件处理器\n  fn._delegateListener = listener\n\n  el.addEventListener(type, listener, capture)\n}\n\nexport default at\n","/**\n * 获取 options 节点下匹配 selector 选择器的 DOM 节点\n * ========================================================================\n * Element.matches() 方法可以用来判断 DOM 元素是否与给定的选择器匹配，事件代理判断是\n * 否触发绑定的代理事件回调函数，关键就是使用 Element.matches() 辨别当前事件触发的目\n * 标 DOM 元素是否为事件代理所期望触发的目标。\n * ========================================================================\n * @method matches\n * @see https://developer.mozilla.org/en-US/docs/web/api/element/matches\n * @param {HTMLElement} el - （必须）DOM 元素\n * @param {String} selector - （必须）匹配 DOM 元素的选择器\n * @returns {Boolean}\n */\nconst matches = (el, selector = '') => {\n  const sel = selector.replace(/^>/i, '')\n\n  if (!selector || !sel || !el) {\n    return false\n  }\n\n  /* istanbul ignore else */\n  if (el.matches) {\n    return el.matches(sel)\n  } else if (el.msMatchesSelector) {\n    return el.msMatchesSelector(sel)\n  } else {\n    return false\n  }\n}\n\nexport default matches\n","/**\n * 获取 DOM 元素的父节点\n * ========================================================================\n * @method getParentOrHost\n * @param {*|HTMLElement} el - （必须）要获取父节点的 DOM 元素\n * @returns {*|HTMLElement}\n */\nconst getParentOrHost = (el) => {\n  return el.host && el !== document && el.host.nodeType\n    ? el.host\n    : el.parentNode\n}\n\nexport default getParentOrHost\n","/**\n * 在某些情况下，某些浏览器（例如：Safari 浏览器）会返回实际的目标元素内部的文本节点。\n * resolveTextNode() 方法则会返回实际的目标节点。\n * ========================================================================\n * @method resolveTextNode\n * @param {HTMLElement|Text} el - 要解析的节点\n * @return {*|HTMLElement} - 实际的目标 DOM 节点\n */\nconst resolveTextNode = function (el) {\n  if (el && el.nodeType === 3) {\n    return el.parentNode\n  }\n\n  return el\n}\n\nexport default resolveTextNode\n","import resolveTextNode from './resolveTextNode'\n\n/**\n * 返回触发事件的 target DOM 元素\n * ========================================================================\n * @method getTarget\n * @param {Event} evt - Event 对象\n * @return {HTMLElement} - Event 对象的 target DOM 元素\n */\nconst getTarget = function (evt) {\n  const target = evt.target\n\n  return resolveTextNode(target)\n}\n\nexport default getTarget\n","import closest from './closest'\nimport off from './off'\nimport getTarget from './getTarget'\nimport { CAPTURE_EVENTS } from './enum'\n\n/**\n * 绑定代理事件\n * ========================================================================\n * @method on\n * @param {HTMLElement|String} el - （必须）绑定代理事件的 DOM 节点\n * @param {String} selector - （必须）事件代理目标 DOM 元素的选择器\n * @param {String} type - （必须）事件类型\n * @param {Function} fn - （必须） 事件处理器回调函数\n * @param {Object} [data] - （可选）传递给事件处理器回调函数的数据对象\n * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向，\n * 当设置为 true 时，则事件处理器回调函数的 this 上下文指向为 data 对象\n * @param {Boolean} once - （可选）是否仅触发一次\n */\nconst on = (el, selector, type, fn, data, context, once = false) => {\n  // CAPTURE_EVENTS 中的特殊事件，采用事件捕获模型\n  const capture = CAPTURE_EVENTS.indexOf(type) > -1\n\n  const listener = function (evt) {\n    const target = getTarget(evt)\n    // 通过 Element.matches 方法获得点击的目标元素\n    const delegateTarget = closest(target, selector, el)\n    let overrideContext = context || el\n\n    evt.delegateTarget = delegateTarget\n\n    // 当设置为 true 时，则事件处理器回调函数的\n    // this 上下文指向为 data 对象\n    if (context === true) {\n      overrideContext = data\n    }\n\n    /* istanbul ignore else */\n    if (delegateTarget) {\n      // 仅触发一次\n      /* istanbul ignore else */\n      if (once === true) {\n        off(el, type, listener)\n      }\n\n      fn.call(overrideContext, evt, data)\n    }\n  }\n\n  if (!el._listeners) {\n    el._listeners = []\n  }\n\n  // 缓存 options 元素绑定的事件处理器\n  el._listeners.push({\n    el,\n    selector,\n    type,\n    fn: listener,\n    data,\n    context,\n    capture\n  })\n\n  // 缓存包装后的事件处理器\n  fn._delegateListener = listener\n\n  el.addEventListener(type, listener, capture)\n}\n\nexport default on\n","import matches from './matches'\nimport getParentOrHost from './getParentOrHost'\n\n/**\n * 获取 options 元素父元素最近的包含 selector 选择器的元素\n * ========================================================================\n * @method closest\n * @param {HTMLElement} el - （必须）DOM 元素\n * @param {String} selector - （必须）DOM 元素的选择其\n * @param {HTMLElement} [ctx] - （必须）比对的 DOM 元素\n * @param {Boolean} [includeCTX] - （必须）是否包含 context DOM 元素\n * @returns {null|HTMLElement} - 返回最接近的 DOM 元素\n */\nconst closest = (el, selector, ctx, includeCTX) => {\n  const context = ctx || document\n\n  if (!el) {\n    return null\n  }\n\n  do {\n    /* istanbul ignore else */\n    if (\n      (selector != null &&\n        (selector[0] === '>'\n          ? el.parentNode === context && matches(el, selector)\n          : matches(el, selector))) ||\n      (includeCTX && el === context)\n    ) {\n      return el\n    }\n\n    /* istanbul ignore else */\n    if (el === context) {\n      break\n    }\n\n    /* jshint boss:true */\n  } while ((el = getParentOrHost(el)))\n}\n\nexport default closest\n","/**\n * 检测当前浏览器是否为 IE 浏览器\n * ========================================================================\n * IE 浏览器返回 true，其它浏览器返回 false\n * ========================================================================\n * @method isIE\n * @returns {Boolean} - IE 浏览器返回 true，其它浏览器返回 false\n */\nconst isIE = () => {\n  const agent = navigator.userAgent\n\n  return !!agent.match(/Trident/g) || !!agent.match(/MSIE/g)\n}\n\nexport default isIE\n","import getListeners from './getListeners'\n\n/**\n * 返回已绑定的事件类型的数组（去除名称重复的事件）\n * ========================================================================\n * @method getTypes\n * @returns {Array}\n */\nconst getTypes = (el) => {\n  const listeners = getListeners(el)\n  const types = []\n\n  listeners.forEach((listener) => {\n    types.push(listener.type)\n  })\n\n  return [...new Set(types)]\n}\n\nexport default getTypes\n","/**\n * 获取 scrollTop 和 scrollLeft 数组数据\n * ========================================================================\n * IE 浏览器种计算 pageX 和 pageY，需要包含 scrollTop 和 scrollLeft 的值\n * ========================================================================\n * @method getScroll\n * @return {Array} - 返回滚动信息的数组 [scrollTop, scrollLeft]\n */\nconst getScroll = function () {\n  const $body = document.documentElement || document.body\n  let scrollXY = [0, 0]\n\n  if ($body && ($body.scrollTop || $body.scrollLeft)) {\n    scrollXY = [$body.scrollTop, $body.scrollLeft]\n  }\n\n  return scrollXY\n}\n\nexport default getScroll\n","import getScrollLeft from './getScrollLeft'\nimport isIE from './utils/isIE'\n\n/**\n * 获取事件触发时的 pageX 值\n * ========================================================================\n * @method getPageX\n * @see https://developer.mozilla.org/zh-CN/docs/Web/API/MouseEvent/pageX\n * @param {Event} evt - （必须）Event 对象\n * @return {Number} - 返回事件触发时的 pageX 值\n */\nconst getPageX = function (evt) {\n  let x = evt.pageX\n\n  /* istanbul ignore else */\n  if (!x && 0 !== x) {\n    x = evt.clientX || 0\n\n    if (isIE()) {\n      x += getScrollLeft()\n    }\n  }\n\n  return x\n}\n\nexport default getPageX\n","import getScroll from './getScroll'\n\n/**\n * 获取 scrollTop 值\n * ========================================================================\n * @method getScrollLeft\n * @see https://developer.mozilla.org/zh-CN/docs/Web/API/Element/scrollLeft\n * @return {Number} - 返回 scrollLeft 值\n */\nconst getScrollLeft = function () {\n  return getScroll()[1]\n}\n\nexport default getScrollLeft\n","import getScrollTop from './getScrollTop'\nimport isIE from './utils/isIE'\n\n/**\n * 获取事件触发时的 pageY 值\n * ========================================================================\n * @method getPageY\n * @see https://developer.mozilla.org/zh-CN/docs/Web/API/MouseEvent/pageY\n * @param {Event} evt - （必须）Event 对象\n * @return {Number} - 返回事件触发时的 pageY 值\n */\nconst getPageY = function (evt) {\n  let y = evt.pageY\n\n  /* istanbul ignore else */\n  if (!y && 0 !== y) {\n    y = evt.clientY || 0\n\n    if (isIE()) {\n      y += getScrollTop()\n    }\n  }\n\n  return y\n}\n\nexport default getPageY\n","import getScroll from './getScroll'\n\n/**\n * 获取 scrollTop 值\n * ========================================================================\n * @method getScrollTop\n * @see https://developer.mozilla.org/zh-CN/docs/Web/API/Element/scrollTop\n * @return {Number} - 返回 getScrollTop 值\n */\nconst getScrollTop = function () {\n  return getScroll()[0]\n}\n\nexport default getScrollTop\n","import isAppleSafari from './utils/isAppleSafari'\n\n/**\n * 返回触发事件的 charCode\n * ========================================================================\n * @method getCharCode\n * @see https://developer.mozilla.org/zh-CN/docs/Web/API/KeyboardEvent/keyCode\n * @see https://developer.mozilla.org/zh-CN/docs/Web/API/KeyboardEvent/charCode\n * @param {Event} evt - Event 对象\n * @return {Number} - 返回事件的 charCode\n */\nconst getCharCode = function (evt) {\n  let code = evt.keyCode || evt.charCode\n  // keycodes for webkit/safari\n  const webkitKeymap = {\n    63232: 38, // up\n    63233: 40, // down\n    63234: 37, // left\n    63235: 39, // right\n    63276: 33, // page up\n    63277: 34, // page down\n    25: 9 // The SHIFT-TAB (Safari provides a different key code in\n    // this case, even though the shiftKey modifier is set)\n  }\n\n  // webkit key normalization\n  if (isAppleSafari() && code in webkitKeymap) {\n    code = webkitKeymap[code]\n  }\n\n  return code\n}\n\nexport default getCharCode\n","/**\n * 判断是否为 Apple 设备的 Safari 浏览器\n * ========================================================================\n * @method isAppleSafari\n * @returns {Boolean}\n */\nconst isAppleSafari = () => {\n  const UA = navigator.userAgent\n  const platforms = /Mac|iPhone|iPod|iPad/i\n  const rejected = /Chrome|Android|CriOS|FxiOS|EdgiOS/i\n  const expected = /Safari/i\n\n  if (rejected.test(UA)) {\n    return false\n  }\n\n  return platforms.test(UA) && expected.test(UA)\n}\n\nexport default isAppleSafari\n","/**\n * 阻止触发绑定事件 DOM 元素的默认行为\n * ========================================================================\n * @method preventDefault\n * @see https://developer.mozilla.org/zh-CN/docs/Web/API/Event/preventDefault\n * @param {Event} evt - 事件对象\n *\n * @example\n * <div id=\"nav\" class=\"nav\">\n *   <a id=\"service\" class=\"anchor\" href=\"https://www.yaohaixiao.com/serivce\">Service</a>\n *   <a id=\"help\" class=\"anchor\" href=\"https://www.yaohaixiao.com/help\">Help</a>\n * </div>\n *\n * const $nav = document.querySelector('#nav')\n * const $service = document.querySelector('.anchor')\n *\n * on($nav, 'click', function(evt) {\n *   console.log('你点击了导航栏')\n * })\n *\n * on($anchor, 'click', function(evt) {\n *   console.log('tagName', this.tagName)\n *\n *   // 在工作台输出：'a'\n *   // 会触发事件冒泡，输出：'你点击了导航栏'\n *   // 但不会切换到 href 属性的页面地址，阻止了点击链接的默认行为\n *   stopEvent(evt)\n * })\n */\nconst preventDefault = function (evt) {\n  evt.preventDefault()\n}\n\nexport default preventDefault\n","/**\n * 终止事件在传播过程的捕获或冒泡的事件流\n * ========================================================================\n * @method stopPropagation\n * @see https://developer.mozilla.org/zh-CN/docs/Web/API/Event/stopPropagation\n * @param {Event} evt - 事件对象\n *\n * @example\n * <div id=\"nav\" class=\"nav\">\n *   <a id=\"service\" class=\"anchor\" href=\"https://www.yaohaixiao.com/serivce\">Service</a>\n *   <a id=\"help\" class=\"anchor\" href=\"https://www.yaohaixiao.com/help\">Help</a>\n * </div>\n *\n * const $nav = document.querySelector('#nav')\n * const $service = document.querySelector('.anchor')\n *\n * on($nav, 'click', function(evt) {\n *   console.log('你点击了导航栏')\n * })\n *\n * on($anchor, 'click', function(evt) {\n *   console.log('tagName', this.tagName)\n *\n *   // 工作台输出：'a'\n *   // 然后跳转到 href 的地址\n *   // 但不会触发事件冒泡，输出：'你点击了导航栏'\n *   stopPropagation(evt)\n * })\n */\nconst stopPropagation = function (evt) {\n  evt.stopPropagation()\n}\n\nexport default stopPropagation\n","import stopPropagation from './stopPropagation'\nimport preventDefault from './preventDefault'\n\n/**\n * 停止事件（阻止默认行为和阻止事件的捕获或冒泡）\n * ========================================================================\n * @method stopEvent\n * @param {Event} evt - 事件对象\n *\n * @example\n * <div id=\"nav\" class=\"nav\">\n *   <a id=\"service\" class=\"anchor\" href=\"https://www.yaohaixiao.com/serivce\">Service</a>\n *   <a id=\"help\" class=\"anchor\" href=\"https://www.yaohaixiao.com/help\">Help</a>\n * </div>\n *\n * const $nav = document.querySelector('#nav')\n * const $service = document.querySelector('.anchor')\n *\n * on($nav, 'click', function(evt) {\n *   console.log('你点击了导航栏')\n * })\n *\n * on($anchor, 'click', function(evt) {\n *   console.log('tagName', this.tagName)\n *\n *   // 工作台输出：'a'\n *   // 不会触发事件冒泡，输出：'你点击了导航栏'\n *   // 也不会切换到 href 属性的页面，阻止了点击链接的默认行为\n *   stopEvent(evt)\n * })\n */\nconst stopEvent = function (evt) {\n  stopPropagation(evt)\n  preventDefault(evt)\n}\n\nexport default stopEvent\n","import createEvent from './createEvent'\nimport off from './off'\nimport at from './at'\nimport on from './on'\nimport only from './only'\nimport once from './once'\nimport focusin from './focusin'\nimport focusout from './focusout'\nimport isElement from './utils/isElement'\nimport isString from './utils/isString'\nimport getListeners from './getListeners'\nimport getTypes from './getTypes'\nimport hasEvent from './hasEvent'\nimport getPageX from './getPageX'\nimport getPageY from './getPageY'\nimport getPageXY from './getPageXY'\nimport getCharCode from './getCharCode'\nimport getRelatedTarget from './getRelatedTarget'\nimport getTarget from './getTarget'\nimport purgeElement from './purgeElement'\nimport destroy from './destroy'\nimport preventDefault from './preventDefault'\nimport stopPropagation from './stopPropagation'\nimport stopEvent from './stopEvent'\nimport stopImmediate from './stopImmediate'\nimport trigger from './trigger'\n\n/**\n * Emitter 类 - JavaScript 事件代理对象\n * ========================================================================\n */\nclass Emitter {\n  /**\n   * Emitter 构造函数\n   * ========================================================================\n   * @constructor\n   * @param {HTMLElement|String} el - （必须）DOM 元素或其选择器\n   * @returns {Emitter} - Emitter 对象\n   */\n  constructor(el) {\n    if (isElement(el)) {\n      this.$el = el\n    } else {\n      if (isString(el)) {\n        this.$el = document.querySelector(el)\n      }\n    }\n  }\n\n  /**\n   * 获取 DOM 元素（type 事件类型）事件绑定信息\n   * ========================================================================\n   * 如果设置了事件类型 type， 则返回指定类型的事件绑定信息，否则返回所有事件绑定信息\n   * ========================================================================\n   * @method getListeners\n   * @param {String} [type] - （可选）事件类型\n   * @returns {Array} - 已绑定的事件信息\n   */\n  getListeners(type) {\n    return getListeners(this.$el, type)\n  }\n\n  /**\n   * 返回已绑定的事件类型的数组（去除名称重复的事件）\n   * ========================================================================\n   * @method getTypes\n   * @since 1.5.0\n   * @returns {Array}\n   */\n  getTypes() {\n    return getTypes(this.$el)\n  }\n\n  /**\n   * 判断是否已经（指定类型的）绑定事件\n   * ========================================================================\n   * @method hasEvent\n   * @since 1.4.0\n   * @param {String} [type] - （可选）事件名称：\n   *                           指定 type，则判断是否绑定 type 类型事件；\n   *                           未指定 type，则判断是否绑定任意类型的事件；\n   * @returns {Boolean}\n   */\n  hasEvent(type) {\n    return hasEvent(this.$el, type)\n  }\n\n  /**\n   * 获取事件触发时的 pageX 值\n   * ========================================================================\n   * @method getPageX\n   * @see getPageX\n   * @param {Event} evt - （必须）Event 对象\n   * @return {Number} - 返回事件触发时的 pageX 值\n   */\n  getPageX(evt) {\n    return getPageX(evt)\n  }\n\n  /**\n   * 获取事件触发时的 pageY 值\n   * ========================================================================\n   * @method getPageY\n   * @see getPageY\n   * @param {Event} evt - （必须）Event 对象\n   * @return {Number} - 返回事件触发时的 pageY 值\n   */\n  getPageY(evt) {\n    return getPageY(evt)\n  }\n\n  /**\n   * 获取事件触发时的 pageX 和 pageY 数组数据\n   * ========================================================================\n   * @method getPageXY\n   * @see getPageXY\n   * @param {Event} evt - （必须）Event 对象\n   * @return {Array} - 返回事件触发时的数组数据：[pageX, pageY]\n   */\n  getPageXY(evt) {\n    return getPageXY(evt)\n  }\n\n  /**\n   * 返回触发事件的 charCode\n   * ========================================================================\n   * @method getCharCode\n   * @see getCharCode\n   * @param {Event} evt - （必须）Event 对象\n   * @return {Number} - 返回事件的 charCode\n   */\n  getCharCode(evt) {\n    return getCharCode(evt)\n  }\n\n  /**\n   * 返回触发（鼠标）事件的 relatedTarget DOM 元素。\n   * ========================================================================\n   * MouseEvent.relatedTarget 只读属性是鼠标事件的次要目标（如果有）。相关的鼠标事件：\n   * mouseenter\n   * mouseleave\n   * mouseover\n   * mouseout\n   * dragenter\n   * dragleave\n   * ========================================================================\n   * @method getRelatedTarget\n   * @since 1.1.0\n   * @see https://developer.mozilla.org/en-US/docs/web/api/mouseevent/relatedtarget\n   * @param {Event} evt - Event 对象\n   * @return {HTMLElement} - Event 对象的 relatedTarget DOM 元素\n   */\n  getRelatedTarget(evt) {\n    return getRelatedTarget(evt)\n  }\n\n  /**\n   * 返回触发事件的 target DOM 元素\n   * ========================================================================\n   * @method getTarget\n   * @since 1.1.0\n   * @param {Event} evt - Event 对象\n   * @return {HTMLElement} - Event 对象的 target DOM 元素\n   */\n  getTarget(evt) {\n    return getTarget(evt)\n  }\n\n  /**\n   * 销毁（type 类型的）代理事件绑定\n   * ========================================================================\n   * 1. 设置了事件类型 type，则销毁指定类型的事件绑定，否则清除所有代理事件绑定\n   * 2. recurse 设置为 true，递归销毁子节点全部事件绑定\n   * ========================================================================\n   * @method purge\n   * @param {String} type  - （必须）事件类型\n   * @param {Boolean} [recurse]  - （可选）是否递归销毁子节点所有事件绑定\n   * 元素绑定的全部事件处理器\n   * @returns {Emitter} - Emitter 对象\n   */\n  purge(type, recurse = false) {\n    purgeElement(this.$el, type, recurse)\n\n    return this\n  }\n\n  /**\n   * 销毁所有已绑定的代理事件\n   * ========================================================================\n   * @method destroy\n   * @returns {Emitter} - Emitter 对象\n   */\n  destroy() {\n    destroy(this.$el)\n\n    return this\n  }\n\n  /**\n   * 创建自定义事件（CustomerEvent）\n   * ========================================================================\n   * @method createEvent\n   * @since 1.8.0\n   * @see createEvent\n   * @param {String} type - （必须）事件类型（名称）\n   * @param {Object} [detail] - （可选）传递给自定义事件的数据，默认为 null\n   * @param {Boolean} [bubbles] - （可选）是否支持冒泡，默认为 true\n   * @param {Boolean} [cancelable] - （可选）是否可以取消，默认为 true\n   * @returns {CustomEvent} - CustomerEvent 实例\n   */\n  createEvent(type, detail = null, bubbles = true, cancelable = true) {\n    return createEvent(type, detail, bubbles, cancelable)\n  }\n\n  /**\n   * 取消 type 类型的代理事件绑定\n   * ========================================================================\n   * 如果没有设置 handler，则销毁 this.$options 绑定的所有符合 type 事件类型的事件绑定\n   * ========================================================================\n   * @method off\n   * @param {String} type - （必须）事件类型\n   * @param {Function} [handler] - （可选）事件处理器回调函数\n   * @returns {Emitter} - Emitter 对象\n   */\n  off(type, handler) {\n    off(this.$el, type, handler)\n\n    return this\n  }\n\n  /**\n   * 绑定事件\n   * ========================================================================\n   * @method at\n   * @param {String|Function} type - （必须）事件类型或者事件处理器回调函数\n   * @param {Function|Object} fn - （必须） 事件处理器回调函数或者传递给事件处理器回调函数的数据对象\n   * @param {Object} [data] - （可选）传递给事件处理器回调函数的数据对象或者事件处理器回调函数的 this 上下文指向，\n   * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向，或者是否仅触发一次\n   * 当设置为 true 时，则事件处理器回调函数的 this 上下文指向为 data 对象\n   * @param {Boolean} once - （可选）是否仅触发一次\n   * @returns {Emitter} - Emitter 对象\n   */\n  at(type, fn, data, context, once = false) {\n    at(this.$el, type, fn, data, context, once)\n\n    return this\n  }\n\n  /**\n   * 绑定代理事件\n   * ========================================================================\n   * @method on\n   * @param {String} selector - （必须）事件代理目标 DOM 元素的选择器\n   * @param {String} type - （必须）事件类型\n   * @param {Function} handler - （必须） 事件处理器回调函数\n   * @param {Object} [data] - （可选）传递给事件处理器回调函数的数据对象\n   * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向：\n   * 当设置为 true 时，则事件处理器回调函数的 this 上下文指向为 data 对象；\n   * 如未指定 context，则事件处理器回调函数的 this 上下文指向为 Emitter 对象；\n   * @param {Boolean} [once] - （可选）是否仅触发一次\n   * @returns {Emitter} - Emitter 对象\n   */\n  on(selector, type, handler, data, context, once = false) {\n    on(this.$el, selector, type, handler, data, context || this, once)\n\n    return this\n  }\n\n  /**\n   * 绑定仅触发一次的事件\n   * ========================================================================\n   * @method only\n   * @param {String} type - （必须）事件类型\n   * @param {Function} handler - （必须） 事件处理器回调函数\n   * @param {Object} [data] - （可选）传递给事件处理器回调函数的数据对象\n   * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向\n   * @returns {Emitter} - Emitter 对象\n   */\n  only(type, handler, data, context) {\n    only(this.$el, type, handler, data, context)\n\n    return this\n  }\n\n  /**\n   * 绑定仅触发一次的代理事件\n   * ========================================================================\n   * @method once\n   * @param {String} selector - （必须）事件代理目标 DOM 元素的选择器\n   * @param {String} type - （必须）事件类型\n   * @param {Function} handler - （必须） 事件处理器回调函数\n   * @param {Object} [data] - （可选）传递给事件处理器回调函数的数据对象\n   * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向\n   * @returns {Emitter} - Emitter 对象\n   */\n  once(selector, type, handler, data, context) {\n    once(this.$el, selector, type, handler, data, context)\n\n    return this\n  }\n\n  /**\n   * 绑定 click 代理事件\n   * ========================================================================\n   * @method click\n   * @since 1.4.0\n   * @see https://developer.mozilla.org/zh-CN/docs/Web/API/Element/click_event\n   * @param {String} selector - （必须）事件代理目标 DOM 元素的选择器\n   * @param {Function} handler - （必须） 事件处理器回调函数\n   * @param {Object} [data] - （可选）传递给事件处理器回调函数的数据对象\n   * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向\n   * @param {Boolean} [once] - （可选）是否仅触发一次\n   * @returns {Emitter} - Emitter 对象\n   */\n  click(selector, handler, data, context, once = false) {\n    on(this.$el, selector, 'click', handler, data, context, once)\n\n    return this\n  }\n\n  /**\n   * 绑定 dbclick 代理事件\n   * ========================================================================\n   * @method dbclick\n   * @since 1.7.0\n   * @see https://developer.mozilla.org/zh-CN/docs/Web/API/Element/dblclick_event\n   * @param {String} selector - （必须）事件代理目标 DOM 元素的选择器\n   * @param {Function} handler - （必须） 事件处理器回调函数\n   * @param {Object} [data] - （可选）传递给事件处理器回调函数的数据对象\n   * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向\n   * @param {Boolean} [once] - （可选）是否仅触发一次\n   * @returns {Emitter} - Emitter 对象\n   */\n  dbclick(selector, handler, data, context, once = false) {\n    on(this.$el, selector, 'dbclick', handler, data, context, once)\n\n    return this\n  }\n\n  /**\n   * 绑定 mouseenter 代理事件\n   * ========================================================================\n   * @method mouseenter\n   * @since 1.4.0\n   * @see https://developer.mozilla.org/en-US/docs/Web/API/Element/mouseenter_event\n   * @param {String} selector - （必须）事件代理目标 DOM 元素的选择器\n   * @param {Function} handler - （必须） 事件处理器回调函数\n   * @param {Object} [data] - （可选）传递给事件处理器回调函数的数据对象\n   * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向\n   * @param {Boolean} [once] - （可选）是否仅触发一次\n   * @returns {Emitter} - Emitter 对象\n   */\n  mouseenter(selector, handler, data, context, once = false) {\n    on(this.$el, selector, 'mouseenter', handler, data, context, once)\n\n    return this\n  }\n\n  /**\n   * 绑定 mouseleave 代理事件\n   * ========================================================================\n   * @method mouseleave\n   * @since 1.4.0\n   * @see https://developer.mozilla.org/en-US/docs/Web/API/Element/mouseleave_event\n   * @param {String} selector - （必须）事件代理目标 DOM 元素的选择器\n   * @param {Function} handler - （必须） 事件处理器回调函数\n   * @param {Object} [data] - （可选）传递给事件处理器回调函数的数据对象\n   * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向\n   * @param {Boolean} [once] - （可选）是否仅触发一次\n   * @returns {Emitter} - Emitter 对象\n   */\n  mouseleave(selector, handler, data, context, once = false) {\n    on(this.$el, selector, 'mouseleave', handler, data, context, once)\n\n    return this\n  }\n\n  /**\n   * 绑定 mousedown 代理事件\n   * ========================================================================\n   * @method mousedown\n   * @since 1.7.0\n   * @see https://developer.mozilla.org/en-US/docs/Web/API/Element/mousedown_event\n   * @param {String} selector - （必须）事件代理目标 DOM 元素的选择器\n   * @param {Function} handler - （必须） 事件处理器回调函数\n   * @param {Object} [data] - （可选）传递给事件处理器回调函数的数据对象\n   * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向\n   * @param {Boolean} [once] - （可选）是否仅触发一次\n   * @returns {Emitter} - Emitter 对象\n   */\n  mousedown(selector, handler, data, context, once = false) {\n    on(this.$el, selector, 'mousedown', handler, data, context, once)\n\n    return this\n  }\n\n  /**\n   * 绑定 mouseup 代理事件\n   * ========================================================================\n   * @method mouseup\n   * @since 1.7.0\n   * @see https://developer.mozilla.org/en-US/docs/Web/API/Element/mouseup_event\n   * @param {String} selector - （必须）事件代理目标 DOM 元素的选择器\n   * @param {Function} handler - （必须） 事件处理器回调函数\n   * @param {Object} [data] - （可选）传递给事件处理器回调函数的数据对象\n   * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向\n   * @param {Boolean} [once] - （可选）是否仅触发一次\n   * @returns {Emitter} - Emitter 对象\n   */\n  mouseup(selector, handler, data, context, once = false) {\n    on(this.$el, selector, 'mouseup', handler, data, context, once)\n\n    return this\n  }\n\n  /**\n   * 绑定 mouseover 代理事件\n   * ========================================================================\n   * @method mouseover\n   * @since 1.7.0\n   * @see https://developer.mozilla.org/en-US/docs/Web/API/Element/mouseover_event\n   * @param {String} selector - （必须）事件代理目标 DOM 元素的选择器\n   * @param {Function} handler - （必须） 事件处理器回调函数\n   * @param {Object} [data] - （可选）传递给事件处理器回调函数的数据对象\n   * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向\n   * @param {Boolean} [once] - （可选）是否仅触发一次\n   * @returns {Emitter} - Emitter 对象\n   */\n  mouseover(selector, handler, data, context, once = false) {\n    on(this.$el, selector, 'mouseover', handler, data, context, once)\n\n    return this\n  }\n\n  /**\n   * 绑定 mousemove 代理事件\n   * ========================================================================\n   * @method mousemove\n   * @since 1.7.0\n   * @see https://developer.mozilla.org/en-US/docs/Web/API/Element/mousemove_event\n   * @param {String} selector - （必须）事件代理目标 DOM 元素的选择器\n   * @param {Function} handler - （必须） 事件处理器回调函数\n   * @param {Object} [data] - （可选）传递给事件处理器回调函数的数据对象\n   * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向\n   * @param {Boolean} [once] - （可选）是否仅触发一次\n   * @returns {Emitter} - Emitter 对象\n   */\n  mousemove(selector, handler, data, context, once = false) {\n    on(this.$el, selector, 'mousemove', handler, data, context, once)\n\n    return this\n  }\n\n  /**\n   * 绑定 mouseout 代理事件\n   * ========================================================================\n   * @method mouseout\n   * @since 1.7.0\n   * @see https://developer.mozilla.org/en-US/docs/Web/API/Element/mouseout_event\n   * @param {String} selector - （必须）事件代理目标 DOM 元素的选择器\n   * @param {Function} handler - （必须） 事件处理器回调函数\n   * @param {Object} [data] - （可选）传递给事件处理器回调函数的数据对象\n   * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向\n   * @param {Boolean} [once] - （可选）是否仅触发一次\n   * @returns {Emitter} - Emitter 对象\n   */\n  mouseout(selector, handler, data, context, once = false) {\n    on(this.$el, selector, 'mouseout', handler, data, context, once)\n\n    return this\n  }\n\n  /**\n   * 绑定 drag 代理事件\n   * ========================================================================\n   * @method drag\n   * @since 1.7.0\n   * @see https://developer.mozilla.org/zh-CN/docs/Web/API/HTMLElement/drag_event\n   * @param {String} selector - （必须）事件代理目标 DOM 元素的选择器\n   * @param {Function} handler - （必须） 事件处理器回调函数\n   * @param {Object} [data] - （可选）传递给事件处理器回调函数的数据对象\n   * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向\n   * @param {Boolean} [once] - （可选）是否仅触发一次\n   * @returns {Emitter} - Emitter 对象\n   */\n  drag(selector, handler, data, context, once = false) {\n    on(this.$el, selector, 'drag', handler, data, context, once)\n\n    return this\n  }\n\n  /**\n   * 绑定 dragend 代理事件\n   * ========================================================================\n   * @method dragend\n   * @since 1.7.0\n   * @see https://developer.mozilla.org/zh-CN/docs/Web/API/HTMLElement/dragend_event\n   * @param {String} selector - （必须）事件代理目标 DOM 元素的选择器\n   * @param {Function} handler - （必须） 事件处理器回调函数\n   * @param {Object} [data] - （可选）传递给事件处理器回调函数的数据对象\n   * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向\n   * @param {Boolean} [once] - （可选）是否仅触发一次\n   * @returns {Emitter} - Emitter 对象\n   */\n  dragend(selector, handler, data, context, once = false) {\n    on(this.$el, selector, 'dragend', handler, data, context, once)\n\n    return this\n  }\n\n  /**\n   * 绑定 dragenter 代理事件\n   * ========================================================================\n   * @method dragenter\n   * @since 1.7.0\n   * @see https://developer.mozilla.org/zh-CN/docs/Web/API/HTMLElement/dragenter_event\n   * @param {String} selector - （必须）事件代理目标 DOM 元素的选择器\n   * @param {Function} handler - （必须） 事件处理器回调函数\n   * @param {Object} [data] - （可选）传递给事件处理器回调函数的数据对象\n   * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向\n   * @param {Boolean} [once] - （可选）是否仅触发一次\n   * @returns {Emitter} - Emitter 对象\n   */\n  dragenter(selector, handler, data, context, once = false) {\n    on(this.$el, selector, 'dragenter', handler, data, context, once)\n\n    return this\n  }\n\n  /**\n   * 绑定 dragleave 代理事件\n   * ========================================================================\n   * @method dragleave\n   * @since 1.7.0\n   * @see https://developer.mozilla.org/zh-CN/docs/Web/API/HTMLElement/dragleave_event\n   * @param {String} selector - （必须）事件代理目标 DOM 元素的选择器\n   * @param {Function} handler - （必须） 事件处理器回调函数\n   * @param {Object} [data] - （可选）传递给事件处理器回调函数的数据对象\n   * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向\n   * @param {Boolean} [once] - （可选）是否仅触发一次\n   * @returns {Emitter} - Emitter 对象\n   */\n  dragleave(selector, handler, data, context, once = false) {\n    on(this.$el, selector, 'dragleave', handler, data, context, once)\n\n    return this\n  }\n\n  /**\n   * 绑定 dragover 代理事件\n   * ========================================================================\n   * @method dragover\n   * @since 1.7.0\n   * @see https://developer.mozilla.org/zh-CN/docs/Web/API/HTMLElement/dragover_event\n   * @param {String} selector - （必须）事件代理目标 DOM 元素的选择器\n   * @param {Function} handler - （必须） 事件处理器回调函数\n   * @param {Object} [data] - （可选）传递给事件处理器回调函数的数据对象\n   * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向\n   * @param {Boolean} [once] - （可选）是否仅触发一次\n   * @returns {Emitter} - Emitter 对象\n   */\n  dragover(selector, handler, data, context, once = false) {\n    on(this.$el, selector, 'dragover', handler, data, context, once)\n\n    return this\n  }\n\n  /**\n   * 绑定 dragstart 代理事件\n   * ========================================================================\n   * @method dragstart\n   * @since 1.7.0\n   * @see https://developer.mozilla.org/zh-CN/docs/Web/API/HTMLElement/dragstart_event\n   * @param {String} selector - （必须）事件代理目标 DOM 元素的选择器\n   * @param {Function} handler - （必须） 事件处理器回调函数\n   * @param {Object} [data] - （可选）传递给事件处理器回调函数的数据对象\n   * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向\n   * @param {Boolean} [once] - （可选）是否仅触发一次\n   * @returns {Emitter} - Emitter 对象\n   */\n  dragstart(selector, handler, data, context, once = false) {\n    on(this.$el, selector, 'dragstart', handler, data, context, once)\n\n    return this\n  }\n\n  /**\n   * 绑定 drop 代理事件\n   * ========================================================================\n   * @method drop\n   * @since 1.7.0\n   * @see https://developer.mozilla.org/zh-CN/docs/Web/API/HTMLElement/drop_event\n   * @param {String} selector - （必须）事件代理目标 DOM 元素的选择器\n   * @param {Function} handler - （必须） 事件处理器回调函数\n   * @param {Object} [data] - （可选）传递给事件处理器回调函数的数据对象\n   * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向\n   * @param {Boolean} [once] - （可选）是否仅触发一次\n   * @returns {Emitter} - Emitter 对象\n   */\n  drop(selector, handler, data, context, once = false) {\n    on(this.$el, selector, 'drop', handler, data, context, once)\n\n    return this\n  }\n\n  /**\n   * 绑定 wheel 代理事件\n   * ========================================================================\n   * @method wheel\n   * @since 1.7.0\n   * @see https://developer.mozilla.org/en-US/docs/Web/API/Element/wheel_event\n   * @param {String} selector - （必须）事件代理目标 DOM 元素的选择器\n   * @param {Function} handler - （必须） 事件处理器回调函数\n   * @param {Object} [data] - （可选）传递给事件处理器回调函数的数据对象\n   * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向\n   * @param {Boolean} [once] - （可选）是否仅触发一次\n   * @returns {Emitter} - Emitter 对象\n   */\n  wheel(selector, handler, data, context, once = false) {\n    on(this.$el, selector, 'wheel', handler, data, context, once)\n\n    return this\n  }\n\n  /**\n   * 绑定 contextmenu 代理事件\n   * ========================================================================\n   * @method contextmenu\n   * @since 1.7.0\n   * @see https://developer.mozilla.org/zh-CN/docs/Web/API/Element/contextmenu_event\n   * @param {String} selector - （必须）事件代理目标 DOM 元素的选择器\n   * @param {Function} handler - （必须） 事件处理器回调函数\n   * @param {Object} [data] - （可选）传递给事件处理器回调函数的数据对象\n   * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向\n   * @param {Boolean} [once] - （可选）是否仅触发一次\n   * @returns {Emitter} - Emitter 对象\n   */\n  contextmenu(selector, handler, data, context, once = false) {\n    on(this.$el, selector, 'contextmenu', handler, data, context, once)\n\n    return this\n  }\n\n  /**\n   * 绑定 focusin 或者 focus 代理事件\n   * ========================================================================\n   * @method focusin\n   * @since 1.4.0\n   * @see https://developer.mozilla.org/zh-CN/docs/Web/API/Element/focus_event\n   * @see https://developer.mozilla.org/en-US/docs/Web/API/Element/focusin_event\n   * @param {String} selector - （必须）事件代理目标 DOM 元素的选择器\n   * @param {Function} handler - （必须） 事件处理器回调函数\n   * @param {Object} [data] - （可选）传递给事件处理器回调函数的数据对象\n   * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向\n   * @param {Boolean} [once] - （可选）是否仅触发一次\n   * @returns {Emitter} - Emitter 对象\n   */\n  focusin(selector, handler, data, context, once = false) {\n    focusin(this.$el, selector, handler, data, context, once)\n\n    return this\n  }\n\n  /**\n   * 绑定 focusout 或者 blur 代理事件\n   * ========================================================================\n   * @method focusout\n   * @since 1.4.0\n   * @see https://developer.mozilla.org/en-US/docs/Web/API/Element/blur_event\n   * @see https://developer.mozilla.org/en-US/docs/Web/API/Element/focusout_event\n   * @param {String} selector - （必须）事件代理目标 DOM 元素的选择器\n   * @param {Function} handler - （必须） 事件处理器回调函数\n   * @param {Object} [data] - （可选）传递给事件处理器回调函数的数据对象\n   * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向\n   * @param {Boolean} [once] - （可选）是否仅触发一次\n   * @returns {Emitter} - Emitter 对象\n   */\n  focusout(selector, handler, data, context, once = false) {\n    focusout(this.$el, selector, handler, data, context, once)\n\n    return this\n  }\n\n  /**\n   * 绑定 change 代理事件\n   * ========================================================================\n   * @method change\n   * @since 1.7.0\n   * @see https://developer.mozilla.org/zh-CN/docs/Web/API/HTMLElement/change_event\n   * @param {String} selector - （必须）事件代理目标 DOM 元素的选择器\n   * @param {Function} handler - （必须） 事件处理器回调函数\n   * @param {Object} [data] - （可选）传递给事件处理器回调函数的数据对象\n   * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向\n   * @param {Boolean} [once] - （可选）是否仅触发一次\n   * @returns {Emitter} - Emitter 对象\n   */\n  change(selector, handler, data, context, once = false) {\n    on(this.$el, selector, 'change', handler, data, context, once)\n\n    return this\n  }\n\n  /**\n   * 绑定 input 代理事件\n   * ========================================================================\n   * @method input\n   * @since 1.7.0\n   * @see https://developer.mozilla.org/zh-CN/docs/Web/API/HTMLElement/input_event\n   * @param {String} selector - （必须）事件代理目标 DOM 元素的选择器\n   * @param {Function} handler - （必须） 事件处理器回调函数\n   * @param {Object} [data] - （可选）传递给事件处理器回调函数的数据对象\n   * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向\n   * @param {Boolean} [once] - （可选）是否仅触发一次\n   * @returns {Emitter} - Emitter 对象\n   */\n  input(selector, handler, data, context, once = false) {\n    on(this.$el, selector, 'input', handler, data, context, once)\n\n    return this\n  }\n\n  /**\n   * 绑定 compositionstart 代理事件\n   * ========================================================================\n   * @method compositionstart\n   * @since 1.7.0\n   * @see https://developer.mozilla.org/zh-CN/docs/Web/API/Element/compositionstart_event\n   * @param {String} selector - （必须）事件代理目标 DOM 元素的选择器\n   * @param {Function} handler - （必须） 事件处理器回调函数\n   * @param {Object} [data] - （可选）传递给事件处理器回调函数的数据对象\n   * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向\n   * @param {Boolean} [once] - （可选）是否仅触发一次\n   * @returns {Emitter} - Emitter 对象\n   */\n  compositionstart(selector, handler, data, context, once = false) {\n    on(this.$el, selector, 'compositionstart', handler, data, context, once)\n\n    return this\n  }\n\n  /**\n   * 绑定 compositionupdate 代理事件\n   * ========================================================================\n   * @method compositionupdate\n   * @since 1.7.0\n   * @see  https://developer.mozilla.org/zh-CN/docs/Web/API/Element/compositionupdate_event\n   * @param {String} selector - （必须）事件代理目标 DOM 元素的选择器\n   * @param {Function} handler - （必须） 事件处理器回调函数\n   * @param {Object} [data] - （可选）传递给事件处理器回调函数的数据对象\n   * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向\n   * @param {Boolean} [once] - （可选）是否仅触发一次\n   * @returns {Emitter} - Emitter 对象\n   */\n  compositionupdate(selector, handler, data, context, once = false) {\n    on(this.$el, selector, 'compositionupdate', handler, data, context, once)\n\n    return this\n  }\n\n  /**\n   * 绑定 compositionend 代理事件\n   * ========================================================================\n   * @method compositionend\n   * @since 1.7.0\n   * @see https://developer.mozilla.org/zh-CN/docs/Web/API/Element/compositionend_event\n   * @param {String} selector - （必须）事件代理目标 DOM 元素的选择器\n   * @param {Function} handler - （必须） 事件处理器回调函数\n   * @param {Object} [data] - （可选）传递给事件处理器回调函数的数据对象\n   * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向\n   * @param {Boolean} [once] - （可选）是否仅触发一次\n   * @returns {Emitter} - Emitter 对象\n   */\n  compositionend(selector, handler, data, context, once = false) {\n    on(this.$el, selector, 'compositionend', handler, data, context, once)\n\n    return this\n  }\n\n  /**\n   * 绑定 paste 代理事件\n   * ========================================================================\n   * @method paste\n   * @since 1.7.0\n   * @see https://developer.mozilla.org/zh-CN/docs/Web/API/Element/paste_event\n   * @param {String} selector - （必须）事件代理目标 DOM 元素的选择器\n   * @param {Function} handler - （必须） 事件处理器回调函数\n   * @param {Object} [data] - （可选）传递给事件处理器回调函数的数据对象\n   * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向\n   * @param {Boolean} [once] - （可选）是否仅触发一次\n   * @returns {Emitter} - Emitter 对象\n   */\n  paste(selector, handler, data, context, once = false) {\n    on(this.$el, selector, 'paste', handler, data, context, once)\n\n    return this\n  }\n\n  /**\n   * 绑定 copy 代理事件\n   * ========================================================================\n   * @method copy\n   * @since 1.7.0\n   * @see https://developer.mozilla.org/zh-CN/docs/Web/API/HTMLElement/copy_event\n   * @param {String} selector - （必须）事件代理目标 DOM 元素的选择器\n   * @param {Function} handler - （必须） 事件处理器回调函数\n   * @param {Object} [data] - （可选）传递给事件处理器回调函数的数据对象\n   * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向\n   * @param {Boolean} [once] - （可选）是否仅触发一次\n   * @returns {Emitter} - Emitter 对象\n   */\n  copy(selector, handler, data, context, once = false) {\n    on(this.$el, selector, 'copy', handler, data, context, once)\n\n    return this\n  }\n\n  /**\n   * 绑定 cut 代理事件\n   * ========================================================================\n   * @method cut\n   * @since 1.7.0\n   * @see https://developer.mozilla.org/zh-CN/docs/Web/API/HTMLElement/cut_event\n   * @param {String} selector - （必须）事件代理目标 DOM 元素的选择器\n   * @param {Function} handler - （必须） 事件处理器回调函数\n   * @param {Object} [data] - （可选）传递给事件处理器回调函数的数据对象\n   * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向\n   * @param {Boolean} [once] - （可选）是否仅触发一次\n   * @returns {Emitter} - Emitter 对象\n   */\n  cut(selector, handler, data, context, once = false) {\n    on(this.$el, selector, 'cut', handler, data, context, once)\n\n    return this\n  }\n\n  /**\n   * 绑定 keydown 代理事件\n   * ========================================================================\n   * @method keydown\n   * @since 1.7.0\n   * @param {String} selector - （必须）事件代理目标 DOM 元素的选择器\n   * @param {Function} handler - （必须） 事件处理器回调函数\n   * @param {Object} [data] - （可选）传递给事件处理器回调函数的数据对象\n   * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向\n   * @param {Boolean} [once] - （可选）是否仅触发一次\n   * @returns {Emitter} - Emitter 对象\n   */\n  keydown(selector, handler, data, context, once = false) {\n    on(this.$el, selector, 'keydown', handler, data, context, once)\n\n    return this\n  }\n\n  /**\n   * 绑定 keyup 代理事件\n   * ========================================================================\n   * @method keyup\n   * @since 1.7.0\n   * @param {String} selector - （必须）事件代理目标 DOM 元素的选择器\n   * @param {Function} handler - （必须） 事件处理器回调函数\n   * @param {Object} [data] - （可选）传递给事件处理器回调函数的数据对象\n   * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向\n   * @param {Boolean} [once] - （可选）是否仅触发一次\n   * @returns {Emitter} - Emitter 对象\n   */\n  keyup(selector, handler, data, context, once = false) {\n    on(this.$el, selector, 'keyup', handler, data, context, once)\n\n    return this\n  }\n\n  /**\n   * 绑定 error 代理事件\n   * ========================================================================\n   * @method error\n   * @since 1.7.0\n   * @see https://developer.mozilla.org/zh-CN/docs/Web/API/Element/error_event\n   * @param {String} selector - （必须）事件代理目标 DOM 元素的选择器\n   * @param {Function} handler - （必须） 事件处理器回调函数\n   * @param {Object} [data] - （可选）传递给事件处理器回调函数的数据对象\n   * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向\n   * @param {Boolean} [once] - （可选）是否仅触发一次\n   * @returns {Emitter} - Emitter 对象\n   */\n  error(selector, handler, data, context, once = false) {\n    on(this.$el, selector, 'error', handler, data, context, once)\n\n    return this\n  }\n\n  /**\n   * 触发代理自定义事件\n   * ========================================================================\n   * @method trigger\n   * @since 1.6.0\n   * @param {String} type - （必须）事件类型\n   * @param {String} selector - （必须）选择器\n   * @returns {Emitter} - Emitter 对象\n   */\n  trigger(type, selector) {\n    trigger(this.$el, type, selector)\n\n    return this\n  }\n\n  /**\n   * 阻止事件的默认行为\n   * ========================================================================\n   * @method preventDefault\n   * @see preventDefault\n   * @param {Event} evt - （必须）Event 对象\n   * @returns {Emitter}  - Emitter 对象\n   */\n  preventDefault(evt) {\n    preventDefault(evt)\n\n    return this\n  }\n\n  /**\n   * 终止事件在传播过程的捕获或冒泡的事件流\n   * ========================================================================\n   * @method stopPropagation\n   * @see stopPropagation\n   * @param {Event} evt - （必须）Event 对象\n   * @returns {Emitter}  - Emitter 对象\n   */\n  stopPropagation(evt) {\n    stopPropagation(evt)\n\n    return this\n  }\n\n  /**\n   * 停止事件（阻止默认行为和阻止事件的捕获或冒泡）\n   * ========================================================================\n   * @method stopEvent\n   * @see stopEvent\n   * @param {Event} evt - （必须）Event 对象\n   * @returns {Emitter}  - Emitter 对象\n   */\n  stopEvent(evt) {\n    stopEvent(evt)\n\n    return this\n  }\n\n  /**\n   * 阻止监听同一事件的其他事件监听器被调用，并且阻止默认行为和事件冒泡。\n   * ========================================================================\n   * @method stopImmediate\n   * @since 1.8.0\n   * @see stopImmediate\n   * @param {Event} evt - （必须）Event 对象\n   */\n  stopImmediate(evt) {\n    stopImmediate(evt)\n\n    return this\n  }\n}\n\nexport default Emitter\n","import isString from './utils/isString'\nimport getTypes from './getTypes'\n\n/**\n * 判断是否已经（指定类型的）绑定事件\n * ========================================================================\n * @method hasEvent\n * @param {HTMLElement} el - 要检测是否绑定事件的 DOM 元素\n * @param {String} [type] - （可选）事件名称：\n *                           指定 type，则判断是否绑定 type 类型事件；\n *                           未指定 type，则判断是否绑定任意类型的事件；\n * @returns {Boolean}\n */\nconst hasEvent = (el, type) => {\n  const types = getTypes(el)\n  let result\n\n  if (types.length < 1) {\n    return false\n  }\n\n  result = types.length > 0\n\n  /* istanbul ignore else */\n  if (type && isString(type)) {\n    result = types.indexOf(type) > -1\n  }\n\n  return result\n}\n\nexport default hasEvent\n","import getPageX from './getPageX'\nimport getPageY from './getPageY'\n\n/**\n * 获取事件触发时的 pageX 和 pageY 数组数据\n * ========================================================================\n * @method getPageXY\n * @param {Event} evt - （必须）Event 对象\n * @return {Array} - 返回事件触发时的数组数据：[pageX, pageY]\n */\nconst getPageXY = function (evt) {\n  return [getPageX(evt), getPageY(evt)]\n}\n\nexport default getPageXY\n","import resolveTextNode from './resolveTextNode'\n\n/**\n * 返回触发（鼠标）事件的 relatedTarget DOM 元素。\n * ========================================================================\n * MouseEvent.relatedTarget 只读属性是鼠标事件的次要目标（如果有）。相关的鼠标事件：\n * mouseenter\n * mouseleave\n * mouseover\n * mouseout\n * dragenter\n * dragleave\n * ========================================================================\n * @method getRelatedTarget\n * @see https://developer.mozilla.org/en-US/docs/web/api/mouseevent/relatedtarget\n * @param {Event} evt - Event 对象\n * @return {HTMLElement} - Event 对象的 relatedTarget DOM 元素\n */\nconst getRelatedTarget = function (evt) {\n  let target = evt.relatedTarget\n  const type = evt.type\n\n  if (!target) {\n    if (type === 'mouseout') {\n      target = evt.toElement\n    } else if (type === 'mouseover') {\n      target = evt.fromElement\n    }\n  }\n\n  return resolveTextNode(target)\n}\n\nexport default getRelatedTarget\n","import getTypes from './getTypes'\nimport purgeElement from './purgeElement'\n\n/**\n * 销毁所有已绑定的代理事件\n * ========================================================================\n * @method destroy\n * @param {HTMLElement} el - 需要解除所有事件绑定的 DOM 元素\n * @returns {Emitter} - Emitter 对象\n */\nconst destroy = (el) => {\n  const types = getTypes(el)\n\n  types.forEach((type) => {\n    purgeElement(el, type, true)\n  })\n}\n\nexport default destroy\n","import at from './at'\n\n/**\n * 绑定只触发一次的事件\n * ========================================================================\n * @method once\n * @param {HTMLElement} el - （必须）绑定代理事件的 DOM 节点\n * @param {String} type - （必须）事件类型\n * @param {Function} fn - （必须） 事件处理器回调函数\n * @param {Object} data - （可选）传递给事件处理器回调函数的数据对象\n * @param {Object|Boolean} context - （可选）事件处理器回调函数的 this 上下文指向，\n * 当设置为 true 时，则事件处理器回调函数的 this 上下文指向为 data 对象\n */\nconst only = (el,  type, fn, data, context) => {\n  at(el, type, fn, data, context, true)\n}\n\nexport default only\n","import on from './on'\n\n/**\n * 绑定只触发一次的事件\n * ========================================================================\n * @method once\n * @param {HTMLElement} el - （必须）绑定代理事件的 DOM 节点\n * @param {String} selector - （必须）事件代理目标 DOM 元素的选择器\n * @param {String} type - （必须）事件类型\n * @param {Function} fn - （必须） 事件处理器回调函数\n * @param {Object} data - （可选）传递给事件处理器回调函数的数据对象\n * @param {Object|Boolean} context - （可选）事件处理器回调函数的 this 上下文指向，\n * 当设置为 true 时，则事件处理器回调函数的 this 上下文指向为 data 对象\n */\nconst once = (el, selector, type, fn, data, context) => {\n  on(el, selector, type, fn, data, context, true)\n}\n\nexport default once\n","import isIE from './utils/isIE'\nimport on from './on'\n\n/**\n * 绑定 focusin 或者 focus 代理事件\n * ========================================================================\n * @method focusin\n * @see https://developer.mozilla.org/zh-CN/docs/Web/API/Element/focus_event\n * @see https://developer.mozilla.org/en-US/docs/Web/API/Element/focusin_event\n * @param {HTMLElement} el - （必须）绑定代理事件的 DOM 节点\n * @param {String} selector - （必须）事件代理目标 DOM 元素的选择器\n * @param {Function} fn - （必须） 事件处理器回调函数\n * @param {Object} [data] - （可选）传递给事件处理器回调函数的数据对象\n * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向，\n * 当设置为 true 时，则事件处理器回调函数的 this 上下文指向为 data 对象\n * @param {Boolean} [once] - （可选）是否仅触发一次\n */\nconst focusin = function (el, selector, fn, data, context, once = false) {\n  const FOCUSIN = isIE() ? 'focusin' : 'focus'\n\n  return on(el, selector, FOCUSIN, fn, data, context, once)\n}\n\nexport default focusin\n","import isIE from './utils/isIE'\nimport on from './on'\n\n/**\n * 绑定 focusout 或者 blur 代理事件\n * ========================================================================\n * @method focusout\n * @see https://developer.mozilla.org/en-US/docs/Web/API/Element/blur_event\n * @see https://developer.mozilla.org/en-US/docs/Web/API/Element/focusout_event\n * @param {HTMLElement} el - （必须）绑定代理事件的 DOM 节点\n * @param {String} selector - （必须）事件代理目标 DOM 元素的选择器\n * @param {Function} fn - （必须） 事件处理器回调函数\n * @param {Object} [data] - （可选）传递给事件处理器回调函数的数据对象\n * @param {Object|Boolean} [context] - （可选）事件处理器回调函数的 this 上下文指向，\n * 当设置为 true 时，则事件处理器回调函数的 this 上下文指向为 data 对象\n * @param {Boolean} [once] - （可选）是否仅触发一次\n */\nconst focusout = function (el, selector, fn, data, context, once = false) {\n  const FOCUSOUT = isIE() ? 'focusout' : 'blur'\n\n  on(el, selector, FOCUSOUT, fn, data, context, once)\n}\n\nexport default focusout\n","import createEvent from './createEvent'\n\n/**\n * 触发代理自定义事件\n * ========================================================================\n * trigger() 方法也可以用来手动触发内置的事件，例如 click, mouseenter 等事件，通常\n * 使用 trigger() 来手动触发用户自定义事件。\n *\n * 另外，选择器 selector 的匹配使用 document.querySelector() 方法，因此仅事件触发一次。\n * ========================================================================\n * @method trigger\n * @see https://developer.mozilla.org/zh-CN/docs/Web/API/CustomEvent\n * @see https://developer.mozilla.org/zh-CN/docs/Web/API/EventTarget/dispatchEvent\n * @param {HTMLElement} el - （必须）绑定代理事件的 DOM 元素\n * @param {String} type - （必须）事件类型\n * @param {String} [selector] - （可选）选择器，没有选择器，则直接触发 el 元素上的自定义事件\n *\n * @example\n * const $list = document.querySelector('#list')\n *\n * // 绑定 alert 自定义事件\n * on($list, '.item', 'alert', itemHandler)\n * on($list, '.remove', 'alert', removeHandler)\n *\n * // 触发 $list 下匹配 '.item' 元素手动触发 alert 自定义事件\n * trigger($list, 'alert', '.item')\n *\n * // 可以使用伪类选择器，更精确的匹配元素\n * trigger($list, 'alert', '.item:last-child')\n *\n * // 触发 $list 下匹配 '.remove' 元素手动触发 alert 自定义事件\n * trigger($list, 'alert', '.remove')\n * trigger($list, 'alert', '.remove:nth-child(2)')\n *\n * // 没有选择器，则直接触发 el 元素上的自定义事件\n * trigger($list, 'alert')\n */\nconst trigger = (el, type, selector) => {\n  let $element\n\n  if (!type) {\n    return false\n  }\n\n  if (selector) {\n    $element = el.querySelector(selector)\n  } else {\n    $element = el\n  }\n\n  if (!$element) {\n    return false\n  }\n\n  $element.dispatchEvent(createEvent(type))\n}\n\nexport default trigger\n","import stopEvent from './stopEvent'\n\n/**\n * 阻止监听同一事件的其他事件监听器被调用，并且阻止默认行为和事件冒泡。\n * ========================================================================\n * @method stopImmediate\n * @see https://developer.mozilla.org/zh-CN/docs/Web/API/Event/stopImmediatePropagation\n * @param {Event} evt - （必须）Event 对象\n *\n * @example\n * <div id=\"nav\" class=\"nav\">\n *   <a id=\"service\" class=\"anchor\" href=\"https://www.yaohaixiao.com/serivce\">Service</a>\n *   <a id=\"help\" class=\"anchor\" href=\"https://www.yaohaixiao.com/help\">Help</a>\n * </div>\n *\n * const $nav = document.querySelector('#nav')\n * const $service = document.querySelector('#service')\n * const logHandler = function(evt) {\n *   console.log(evt.target)\n * }\n * const styleHandler = function(evt) {\n *   $nav.classList.add('checked')\n * }\n * const serviceHandler = function(evt) {\n *   alert(evt.target)\n *   stopImmediate(evt)\n * }\n * const removeHandler = function(evt) {\n *   const $target = evt.target\n *\n *   $target.parentNode.removeChild($target)\n * }\n *\n * $nav.addEventListener('click', logHandler)\n * $nav.addEventListener('click', styleHandler)\n * $service.addEventListener('click', serviceHandler)\n * $service.addEventListener('click', removeHandler)\n *\n * $nav.click()\n * // => 触发 logHandler 和 styleHandler\n *\n * $service.click()\n * // => 仅触发 serviceHandler，不会触发 removeHandler\n * // => 并且不会跳转页面，也不会冒泡到 $nav，不会触发 logHandler 和 styleHandler\n */\nconst stopImmediate = function (evt) {\n  stopEvent(evt)\n  evt.stopImmediatePropagation()\n}\n\nexport default stopImmediate\n","import Emitter from './emitter'\n\nconst delegate = (el) => {\n  return new Emitter(el)\n}\n\nexport default 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