node package manager

Introducing npm Enterprise add-ons. Integrate third-party dev tools into npm…


Backbone like Class.extend utility for Node


Backbone's .extend like inheritance helper for Node.js

You basically got two options:

// 1. Extend from the blank class 
var Base = require('class-extend');
var Sub = Base.extend();
// 2. Add the .extend helper to a class 
MyClass.extend = require('class-extend').extend;

.extend allow you to assign prototype and static methods.

If no constructor method is assigned, the parent constructor method will be called by default.

// Extend a class 
var Sub = Parent.extend({
  // Overwrite the default constructor 
  constructor: function () {},
  // Sub class prototypes methods 
  hello: function () { console.log('hello'); }
}, {
  // Constructor static methods 
  hey: function () { console.log('hey'); }
// LOG: hey 
var instance = new Sub();
// LOG: hello 

Sub classes are assigned a __super__ static property pointing to their parent prototype.

var Sub = Parent.extend();
assert(Sub.__super__ === Parent.prototype);

Copyright (c) 2013 Simon Boudrias
Licensed under the MIT license.