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jareware/logger.js

Last active June 7, 2018 04:16
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Revisions

  1. jareware revised this gist Aug 12, 2013. 1 changed file with 5 additions and 3 deletions.
    8 changes: 5 additions & 3 deletions logger.js
    View file
    Original file line number Diff line number Diff line change
    @@ -23,12 +23,13 @@ define(function() {
    var ENABLED = true;
    var TIMESTAMP = true;

    var topLabelLength = 0;
    var topLabelLength = 0; // this is shared across the application so that log lines align

    return {

    create: function(label) {
    create: function(label, enabled) {

    enabled = !!enabled || enabled === undefined; // allow enabling/disabling individual loggers
    topLabelLength = window.Math.max(topLabelLength, label.length);

    var boxedLabel = '[' + label + ']';
    @@ -41,8 +42,9 @@ define(function() {
    */
    var logger = function() {

    if (!ENABLED || !window.console || !window.console.log)
    if (!ENABLED || !enabled || !window.console || !window.console.log) {
    return;
    }

    var now = new Date();
    var secPadded = now.getSeconds() > 9 ? now.getSeconds() : '0' + now.getSeconds();
  2. jareware created this gist Jan 31, 2013.
    86 changes: 86 additions & 0 deletions logger.js
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,86 @@
    /**
    * Simple utility for unified logging to the console, with optional timestamping.
    *
    * @example // Create several loggers around the application:
    * var log = logger.create('main');
    * var logInAnotherModule = logger.create('anotherModule');
    *
    * // Call the created loggers:
    * log('Application started');
    * logInAnotherModule('Module started');
    *
    * // Produces the following in the console:
    * // 59.771 [main] Application started logger.js:53
    * // 59.775 [anotherModule] Module started
    *
    * @author Jarno Rantanen <[email protected]>
    * @license http://opensource.org/licenses/MIT
    */
    define(function() {

    "use strict";

    var ENABLED = true;
    var TIMESTAMP = true;

    var topLabelLength = 0;

    return {

    create: function(label) {

    topLabelLength = window.Math.max(topLabelLength, label.length);

    var boxedLabel = '[' + label + ']';

    /**
    * Main logging method returned by create(). Writes any arguments directly to window.console.
    *
    * @example log('foobar', { baz: 123 });
    * // => "[main] foobar Object {baz: 123}"
    */
    var logger = function() {

    if (!ENABLED || !window.console || !window.console.log)
    return;

    var now = new Date();
    var secPadded = now.getSeconds() > 9 ? now.getSeconds() : '0' + now.getSeconds();
    var ms = now.getMilliseconds();
    var msPadded = ms > 99 ? ms : (ms > 9 ? '0' + ms : '00' + ms);
    var timestamp = TIMESTAMP ? (secPadded + '.' + msPadded + ' ') : '';
    var tagPadding = new Array(topLabelLength - label.length + 1).join(' ');
    var argsToLog = Array.prototype.slice.call(arguments);

    window.console.log.apply(window.console, [ timestamp + tagPadding + boxedLabel ].concat(argsToLog));

    };

    /**
    * Helper for writing out objects.
    *
    * @example log.hash({ herp: 123, derp: 456 });
    * // => "[main] herp: 123 , derp: 456"
    */
    logger.hash = function(hash) {

    var pieces = [];

    Object.keys(hash).forEach(function(key) {
    pieces.push(key + ':');
    pieces.push(hash[key]);
    pieces.push(',');
    });

    pieces.pop();

    logger.apply(logger, pieces);

    };

    return logger;

    }
    };

    });