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POjQuery logger plugin
 

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    <p>I'm working on a jQuery plugin that allows you to log any javascript class or object. The idea is to override each function inside the object, or prototype of a function.</p> <pre><code>(function($) { "use strict"; $.log = function(object, logger) { if (!$.isFunction(logger)) { logger = function(name, args) { console.log(name + "(" + $.makeArray(args).join(", ") + ")"); }; } var s = $.isFunction(object) ? object.prototype : object; for (name in s) { var fn = s[name]; if ($.isFunction(fn)) { s[name] = (function(name, fn) { return function() { logger(name, arguments); return fn.apply(this, arguments); }; })(name, fn); } } }; })(jQuery); </code></pre> <p>This seems to work for logging individual plugins. For example <code>$.log($.ui.tabs);</code> logs all the function calls inside the tabs prototype.</p> <p>But when I want to log all of jQuery <code>$.log($);</code> it's giving me some reference error. I can't figure out why I'm getting this error. I'm under the impression it has something to do with either <code>this</code> or the arguments being passed, but I'm not sure.</p> <p>Edit: Now I think about It some more it might also be caused because the overridden function always returns.</p> <p>I created a fiddle to demo the problem: <a href="http://jsfiddle.net/Sj6xN/4/" rel="nofollow">http://jsfiddle.net/Sj6xN/4/</a></p> <p><strong>EDIT:</strong></p> <p>This is the code i ended up with, so far working perfectly:</p> <pre><code>(function($) { "use strict"; var Logger = function(options) { this.options = $.extend(this.defaults, options); }; Logger.prototype = { defaults: { inherited: false, deep: false, logWriter: function(name, args) { console.log("CALL: " + name + "(" + $.makeArray(args).join(", ") + ")"); } }, augment: function(object) { var self = this; // Make sure this object is not already augmented if (object.__isAugmented__) { return; } // Set 'isAugmented' to prevent recursion object.__isAugmented__ = true; // Loop through the object for (var name in object) { var originalFunction = object[name]; // If it's a function and the function is not inherited or 'inherited' is enabled augment it if ($.isFunction(originalFunction) &amp;&amp; (object.hasOwnProperty(name) || self.options.inherited)) { // Wrap in self executing function so references to 'name' and 'orginalFunction' are maintained object[name] = (function(name, originalFunction) { // If the function has a prototype and 'deep' is enabled augment that as well if (self.options.deep &amp;&amp; originalFunction.prototype) { self.augment(originalFunction.prototype); } var augmentedFunction = function() { // Execute log writer self.options.logWriter(name, arguments); // Call original function return originalFunction.apply(this, arguments); }; // Inherit prototype of original function augmentedFunction.prototype = originalFunction.prototype; // Return the augmented function return augmentedFunction; })(name, originalFunction); } // If it's a plain object and 'deep' is enabled augment that as well else if (self.options.deep &amp;&amp; $.isPlainObject(originalFunction)) { self.augment(originalFunction); } } } }; $.log = function(object, options) { var logger = new Logger(options); // If the object is a function use it's prototype, otherwise assume a plain object object = $.isFunction(object) ? object.prototype : object; // Augment logger.augment(object); }; })(jQuery); </code></pre> <p>Can be used like this:</p> <pre><code>$.log(&lt;object or function&gt; [, { inherited: &lt;bool&gt;, deep: &lt;bool&gt;, logWriter: &lt;function(name, args)&gt; }]); </code></pre>
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