mirror of
https://github.com/twbs/bootstrap.git
synced 2024-12-14 02:24:00 +01:00
33 lines
1.3 KiB
JavaScript
33 lines
1.3 KiB
JavaScript
// https://gist.github.com/paulirish/1579671
|
|
// 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);
|
|
};
|
|
}());
|