requestAnimationFrame polyfill

rAF.js

// http://paulirish.com/2011/requestanimationframe-for-smart-animating/
// http://my.opera.com/emoller/blog/2011/12/20/requestanimationframe-for-smart-er-animating

// requestAnimationFrame polyfill by Erik Möller. fixes from Paul Irish and Tino Zijdel

// MIT license

(function() {
    var lastTime = 0;
    var vendors = ['ms', 'moz', 'webkit', 'o'];
    for(var x = 0; x < vendors.length && !window.requestAnimationFrame; ++x) {
        window.requestAnimationFrame = window[vendors[x]+'RequestAnimationFrame'];
        window.cancelAnimationFrame = window[vendors[x]+'CancelAnimationFrame'] 
                                   || window[vendors[x]+'CancelRequestAnimationFrame'];
    }
 
    if (!window.requestAnimationFrame)
        window.requestAnimationFrame = function(callback, element) {
            var currTime = new Date().getTime();
            var timeToCall = Math.max(0, 16 - (currTime - lastTime));
            var id = window.setTimeout(function() { callback(currTime + timeToCall); }, 
              timeToCall);
            lastTime = currTime + timeToCall;
            return id;
        };
 
    if (!window.cancelAnimationFrame)
        window.cancelAnimationFrame = function(id) {
            clearTimeout(id);
        };
}());

Due to an unconfirmed bug in OldIE(maybe the poor performance), many tasks were delaying running.

There are two intended bad Fibonacci demos.

1. Check the original one in IE8(or lower version), then you may find that timeToCall is gradually growing bigger and bigger.

   

   I've made a little change to this code.
   https://gist.github.com/lenville/9e13e63af075c145d662/revisions#diff-0

   // line 20
   var timeToCall = Math.max(0, 16 - Math.abs(currTime - lastTime));

2. Check the revision.

   Now everything works very well, like this:
   

In this article, David Geary implements a interesting version of polyfill.
http://www.ibm.com/developerworks/library/j-html5-game2/#N101B4

What do you think about it?

I've written a solution that doesn't queue each callback separately but execute all scheduled for next frame simultaneously:

https://github.com/milosdjakonovic/requestAnimationFrame-polyfill

Second (third, fourth...) opinion and eyeball check would do good.

In most situations I use miniraf ✨

Maybe I'm still missing something but for me the polyfill is not working right now and I am triong to figure out what is missing

Uncaught SyntaxError: Missing initializer in const declaration

Hai , i am new to angular2. i have a conflict in loading the angular2 webapp in safari browser. Actually where to use this code in the code so that i can get rid of this browser problem. is this also the solution for improper loading of c3 charts in certain browsers like safari and microsoft edge. please help me out and thanks in advance.

Hi Vennapusaravali,

More suitable for the Angular 4 repo, however if you checkout this JS file and add the script to angular-cli.jsons "scripts": [ ".../path/to/this/file/rAF.js" ] it should load correctly. More info can be found here.

Hello, can someone help me with a question in my website? I don't know where is the issue list, or who I can ask. My website is not working the parallax.js (http://memphisnet.com.br/3.0/)

Thanks advice

Hi guys,

Anyone know the answer to this question: https://stackoverflow.com/questions/52508261/do-we-need-to-clear-a-timeout-when-using-requestanimationframe-polyfill ? Would like to hear a professional opinion.

Thanks

I've been reading a lot of the comments but I am kinda bit confused now which code to be implemented.

Hello,

I just adapted Paul Irish's polyfill to work with high resolution timing automatically (when possible) and improved the performance a little bit.

It can work with the following window.performance.now polyfill: https://gist.github.com/jalbam/cc805ac3cfe14004ecdf323159ecf40e

Here it is:

'use strict';

// requestAnimationFrame polyfill by Erik Möller.
// Fixes from Paul Irish, Tino Zijdel, Andrew Mao, Klemen Slavic, Darius Bacon and Joan Alba Maldonado.
// Adapted from https://gist.github.com/paulirish/1579671 which derived from
// http://paulirish.com/2011/requestanimationframe-for-smart-animating/
// http://my.opera.com/emoller/blog/2011/12/20/requestanimationframe-for-smart-er-animating
// Added high resolution timing. This window.performance.now() polyfill can be used: https://gist.github.com/jalbam/cc805ac3cfe14004ecdf323159ecf40e
// MIT license
// Gist: https://gist.github.com/jalbam/5fe05443270fa6d8136238ec72accbc0
(function() {
	var vendors = ['webkit', 'moz', 'ms', 'o'], vp = null;
	for (var x = 0; x < vendors.length && !window.requestAnimationFrame && !window.cancelAnimationFrame; x++)
	{
		vp = vendors[x];
		window.requestAnimationFrame = window.requestAnimationFrame || window[vp + 'RequestAnimationFrame'];
		window.cancelAnimationFrame = window.cancelAnimationFrame || window[vp + 'CancelAnimationFrame'] || window[vp + 'CancelRequestAnimationFrame'];
	}
	if (/iP(ad|hone|od).*OS 6/.test(window.navigator.userAgent) || !window.requestAnimationFrame || !window.cancelAnimationFrame) //iOS6 is buggy.
	{
		var lastTime = 0;
		window.requestAnimationFrame = function(callback, element)
		{
			var now = window.performance.now();
			var nextTime = Math.max(lastTime + 16, now);
			return setTimeout(function() { callback(lastTime = nextTime); }, nextTime - now);
		};
		window.cancelAnimationFrame = clearTimeout;
	}
}());

You can found it in this gist: https://gist.github.com/jalbam/5fe05443270fa6d8136238ec72accbc0

Any comments are welcome. Thank you very much.