Klassy.js

A class system for JavaScript featuring mixins, constructors, and superclass access.

Extracted from Orbit.js.

Usage

Either define your own base class with defineClass or use the built-in
base class Klass.

Any classes can be extended via the extend method.

$3

A base class that can be extended.

``javascript
var CelestialObject = Klass.extend({
init: function(name) {
this._super();
this.name = name;
this.isCelestialObject = true;
},
greeting: function() {
return 'Hello from ' + this.name;
}
});

var Planet = CelestialObject.extend({
init: function(name) {
this._super.apply(this, arguments);
this.isPlanet = true;
},
greeting: function() {
return this._super() + '!';
},
});

var earth = new Planet('Earth');

console.log(earth instanceof Klass); // true
console.log(earth instanceof CelestialObject); // true
console.log(earth instanceof Planet); // true

console.log(earth.isCelestialObject); // true
console.log(earth.isPlanet); // true

console.log(earth.greeting()); // 'Hello from Earth!'
`

$3

Define a new class with the properties and methods of one or more other classes.

The new class can be based on a SuperClass, which will be inserted into its
prototype chain.

Furthermore, one or more mixins (object that contain properties and/or methods)
may be specified, which will be applied in order. When a method is replaced
with another method, it will be wrapped in a function that makes the previous
method accessible via this._super.

defineClass(SuperClass [, mixins, ...])

* SuperClass - A base class to extend. If mixins are to be included
without a SuperClass, pass null for SuperClass.
* mixins - One or more objects that contain properties and methods
to apply to the new class.

$3

Extend a class with the properties and methods of one or more other classes.

When a method is replaced with another method, it will be wrapped in a
function that makes the replaced method accessible via this._super.

extendClass(destination [, source, ...])

* destination - The class to merge into
* source` - One or more source classes

License

Copyright 2014-2015 Cerebris Corporation. MIT License (see LICENSE for details).