requestAnimationFrame polyfill

requestAnimationFrame.js

/** @type {function((Function|string)):number} */
var requestAnimationFrame = window.requestAnimationFrame || ( function() {

	/** @type {Array.<Function>} */
	var queue = [];
	/** @type {number} */
	var last = Date.now() - 100 / 6;

	( function frame() {

		var n = Date.now();
		var l = last;

		var q = queue.splice( 0 );
		while ( q.length ) {
			q.shift()( n );
		}

		last = n;

		setTimeout( frame, 100 / 3 - n + l );

	}() );

	return queue.push.bind( queue );

}() );