klass

klass.js

(function() {

	var klass = function(Parent, props) {
		var Child, F, i;

		// 1.
		// new constructor
		Child = function() {
			// Call the super class constructor
			if (Child._super && Child._super.hasOwnProperty('_construct')) {
				Child._super._construct.apply(this, arguments);
			}
			// Call our constructor
			if (Child.prototype.hasOwnProperty('_construct')) {
				Child.prototype._construct.apply(this, arguments);
			}
		}

		// 2.
		// inherit
		Parent = Parent || Object;
		F = function() {};
		F.prototype = Parent.prototype;
		Child.prototype = new F();
		Child._super = Parent.prototype;
		Child.prototype.constructor = Child;

		// 3.
		// add implementation methods
		for (i in props) {
			if (props.hasOwnProperty(i)) {
				Child.prototype[i] = props[i];
			}
		}

		// 4.
		// return the "class"
		return Child;
	}

})();