chainable wrapper for JS setTimeout and setInterval

call.js

// call.js
// chainable setTimeout and setInterval JavaScript wrapper
//
// By Daniel Hug: https://gist.github.com/Daniel-Hug/9062765
// MIT license: http://hug.mit-license.org/
//
// use:
// var timer = call(fn, scope, args).after(1000).start();
// var interval = call(fn, scope, args).every(1000).fire().start();
// timer.stop();
// interval.stop();

function call(cb, scope, args) {
	var t = this;

	// automate 'new' keyword
	if (!(t instanceof call)) return new call(cb, scope, args);

	// set initial values
	t.id = null;
	t.delay = null;
	t.going = false;
	t.fire = function() {
		cb.apply(scope, args);
		return t;
	};
}

call.prototype = {
	after: function(delay) {
		var t = this;
		t.delay = delay;
		t.caller = function() {
			t.going = false;
			return t.fire();
		};
		return t;
	},
	every: function(delay) {
		var t = this;
		t.delay = delay;
		t.caller = function() {
			t.fire().id = setTimeout(function() {
				t.caller();
			}, delay);
		};
		return t;
	},
	start: function() {
		clearTimeout(this.id);
		this.going = true;
		this.id = setTimeout(this.caller, this.delay);
		return this;
	},
	stop: function() {
		clearTimeout(this.id);
		this.going = false;
		return this;
	}
};