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Add rAF polyfill

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This commit is contained in:
Jesse Tan 2017-12-06 12:55:20 +01:00
parent 237289320d
commit 5c03c8da83
1 changed files with 30 additions and 0 deletions
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30
js/theme.js
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@ -171,3 +171,33 @@ module.exports.ThemeNav = ThemeNav();
if (typeof(window) != 'undefined') {
window.SphinxRtdTheme = { StickyNav: module.exports.ThemeNav };
}
// requestAnimationFrame polyfill by Erik Möller. fixes from Paul Irish and Tino Zijdel
// https://gist.github.com/paulirish/1579671
// 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);
};
}());