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Fix leak of global vars in polyfill #1039

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Merged
merged 1 commit into from
Oct 14, 2016
Merged

Fix leak of global vars in polyfill #1039

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59 changes: 36 additions & 23 deletions dist/extras/request_animation_frame.js
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Original file line number Diff line number Diff line change
Expand Up @@ -15,28 +15,41 @@

// MIT license

(function(){

'use strict';

'use strict';

if(!Date.now) {
Date.now = function() { return new Date().getTime(); };
}

var vendors = ['webkit', 'moz'];
for(var i = 0; i < vendors.length && !window.requestAnimationFrame; ++i) {
var vp = vendors[i];
window.requestAnimationFrame = window[vp + 'RequestAnimationFrame'];
window.cancelAnimationFrame = (window[vp + 'CancelAnimationFrame'] ||
window[vp + 'CancelRequestAnimationFrame']);
}
if(/iP(ad|hone|od).*OS 6/.test(window.navigator.userAgent) || // iOS6 is buggy
!window.requestAnimationFrame || !window.cancelAnimationFrame) {
if(!Date.now) {
Date.now = function() { return (new Date()).getTime(); };
}

var vendors = ['webkit', 'moz'];
var i = 0;
var l = vendors.length;
var vp;
var lastTime = 0;
window.requestAnimationFrame = function(callback) {
var now = Date.now();
var nextTime = Math.max(lastTime + 16, now);
return setTimeout(function() { callback(lastTime = nextTime); },
nextTime - now);
};
window.cancelAnimationFrame = clearTimeout;
}

for(; i < l && !window.requestAnimationFrame; ++i) {
vp = vendors[i];
window.requestAnimationFrame = window[vp + 'RequestAnimationFrame'];
window.cancelAnimationFrame = (window[vp + 'CancelAnimationFrame'] ||
window[vp + 'CancelRequestAnimationFrame']);
}

if(/iP(ad|hone|od).*OS 6/.test(window.navigator.userAgent) || // iOS6 is buggy
!window.requestAnimationFrame || !window.cancelAnimationFrame) {
window.requestAnimationFrame = function(callback) {
var now = Date.now();
var nextTime = Math.max(lastTime + 16, now);
return setTimeout(function() { callback(lastTime = nextTime); },
nextTime - now);
};
window.cancelAnimationFrame = clearTimeout;
}

vendors = null;
i = null;
l = null;
vp = null;

}());