class.js

Simple Class System for JavaScript. Designed to work with backbone.js and node.js.

Features

• Inheritance
• Mixins
• Interfaces
• Properties
  • getter / setter
  • visibility
  • type check (Class, Object, String, Number, Boolean, Function, Array, Element, Regex)
  • format value
  • validation
  • init value
  • events (optional, event emitter needed: e.g. Backbone.Events, node.js events.EventEmitter)
• super - reference on super class
• Singleton
• Browser & commonJS support

Dependencies

• http://underscorejs.org

Usage

Browser:

<script src="unsercore.js"></script>
<script src="class.js"></script>

node.js:

npm install classjs

require("classjs");

Example

var Monkey = Class.define(EventEmitter, {
	properties : {
		"legs" : {
			type : "Number",
			init : 4,
			validate : function(value, old) {
				return value <= 4;
			},
			apply : "_applyLegs",
			event : "legsChanged"
		},

		head : {
			type : "Object",
			get : false, // generate only private getter / setter
			set : false
		}
	},

	members : {
		_applyLegs : function(value, old) {
			console.log(value, old);
		},
		
		jump : function() {
			console.log("jump");
		}
	}
});

var TwoLeggedMonkey = Monkey.extend({
	constructor : function() {
		this.__super__.apply(this, arguments);
		this.setLegs(3, false); // Do not fire the event
	},
	
	jump : function() {
		this.__super__.jump.apply(arguments);
	}
});

var monkey = new TwoLeggedMonkey();
monkey.on("legsChanged", function(data) {
	console.log("Legs changed to %i", data.value);
});
monkey.jump();
monkey.setLegs(2);