Getting the class name to show up in the console when using Resig's Simple JavaScript Inhertiance

I’m using Resig’s Simple JavaScript Inheritance to create my classes. The only thing I don’t like about it so far is that when I log an object created with this library to the console, it’s name is simply “Class”. My question is whether there is a way to modify his code so that I get the actual class name in the console instead. Here’s an example from Chrome’s console:

enter image description here

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  • I would really like that name “Class” to be the actual name of the class I’ve created, in the way it would if you did the following:

    enter image description here

    I believe I know the reason why this happen’s with Resig’s library: the actual constructor function is simply named “Class”. Here’s the code for his library:

      var initializing = false,
        // Determine if functions can be serialized
        fnTest = /xyz/.test(function(){xyz;}) ? /\b_super\b/ : /.*/;
      // Create a new Class that inherits from this class
      Object.subClass = function(prop) {
        var _super = this.prototype;
        // Instantiate a base class (but only create the instance,
        // don't run the init constructor)
        initializing = true;
        var proto = new this();
        initializing = false;
        // Copy the properties over onto the new prototype
        for (var name in prop) {
          // Check if we're overwriting an existing function
          proto[name] = typeof prop[name] == "function" &&
            typeof _super[name] == "function" && fnTest.test(prop[name]) ?
            (function(name, fn){
              return function() {
                var tmp = this._super;
                // Add a new ._super() method that is the same method
                // but on the super-class
                this._super = _super[name];
                // The method only need to be bound temporarily, so we
                // remove it when we're done executing
                var ret = fn.apply(this, arguments);       
                this._super = tmp;
                return ret;
            })(name, prop[name]) :
        // The dummy class constructor
        function Class() {
          // All construction is actually done in the init method
          if ( !initializing && this.init )
            this.init.apply(this, arguments);
        // Populate our constructed prototype object
        Class.prototype = proto;
        // Enforce the constructor to be what we expect
        Class.constructor = Class;
        // And make this class extendable
        Class.subClass = arguments.callee;
        return Class;

    You’ll find the Class() function about 2/3 of the way down. Does anyone know how to modify this code so that you get the actual name of the class in the console?

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  • One Solution collect form web for “Getting the class name to show up in the console when using Resig's Simple JavaScript Inhertiance”

    Toss in a change to Person.prototype.constructor when you’re creating Person:

    var Person = (function() {
      var myConstructor = Class.extend({
        init: function(isDancing){
          this.dancing = isDancing;
        dance: function(){
          return this.dancing;
      myConstructor.prototype.constructor = function Person(){};
      return myConstructor;

    I don’t think you could do it from within the Simple JavaScript Inheritance. You’d need the Person.prototype.constructor to be a named function, and I don’t think you can name a function without eval… and you have too much rep for me to explain why you shouldn’t do that 😉

    No promises this doesn’t screw something up elsewhere though 😛