JS.Class - Ruby-like classes for JavaScript

Singleton methods

In Ruby, singleton methods are methods attached to a single object rather than defined in a class. If you add a singleton method to a Ruby object, super refers to the method from the object’s class definition. JS.Class allows the same behaviour. Recall our Animal class:

        var Animal = new JS.Class({
          initialize: function(name) {
            this.name = name;
          },
          speak: function(things) {
            return 'My name is ' + this.name + ' and I like ' + things;
          }
        });

We can create a new animal and extend it with singleton methods. All JS.Class-derived objects have an extend() method for doing this:

        var cow = new Animal('Daisy');
        
        cow.extend({
          speak: function(stuff) {
            return 'Mooo! ' + this.callSuper();
          },
          getName: function() {
            return this.name;
          }
        });
        
        cow.getName()   // -> "Daisy" 
        
        cow.speak('grass')
            // -> "Mooo! My name is Daisy and I like grass"

JS.Class Ruby-like classes for JavaScript

Singleton methods