logger

logger

The logger module provides an object that wraps various console logging methods safely. The default level is OFF, but it is recommended that you set this according to your environment either at build time or by a cookie in the browser in the format _bvui_debug=loglevel:1.

Usage

var Logger = require('bv-ui-core/lib/logger');
// <method> is one of the 5 types, ex: log
Logger.<method>('Hello, world!') // console.log('Hello, world!')

Other Methods

Logger.setLogLevel

Set the log level to one of the following to prevent logging under the specified level.

Logger.DEBUG
Logger.LOG
Logger.INFO
Logger.WARN
Logger.ERROR
Logger.OFF

var Logger = require('bv-ui-core/lib/logger');

// Set's the default log level to one of the valid levels
// DEBUG, LOG, INFO, WARN, ERROR, OFF
Logger.setLogLevel(Logger.DEBUG)

Logger.log('Hello, World!') // Prints Hello, World!

Logger.setLogLevel(Logger.INFO)

Logger.log('Hello, World!') // Prints nothing because of logLevel

If you have set the logLevel via cookie, any calls to setLogLevel in your application will be ignored unless you also pass a force param.

setLogLevel(Logger.LOG, true); // forces LogLevel to LOG

Logger.group/Logger.groupEnd

https://developer.mozilla.org/en-US/docs/Web/API/console/group

Logger.time/Logger.timeEnd

https://developer.mozilla.org/en-US/docs/Web/API/console/time

Logger.assert

Assertions can be made if logLevel is not Logger.OFF. You can assert a function's result or a boolean value.

Logger.assert(() => {
  return false;
  }, 'The function failed!'
);

Logger.assert(true === false, 'Obviously, I failed.');

##Bookmarklet

You can use the following bookmarklet in a browser to specify your loglevel. Save the below script as a bookmark and click on it when you want to modify the stored cookie value.

javascript:(function() { var val = prompt('Enter log level (From -1 to 4)'); if (!val && val !== 0) { return; } document.cookie='_bvui_debug=logLevel:' + val; }());