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Remove the requestAnimationFrame polyfill

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According to https://developer.mozilla.org/en-US/docs/Web/API/window/requestAnimationFrame#Browser_compatibility and https://caniuse.com/#feat=requestanimationframe, the browsers we intend to support with PDF.js version 2.0 should all have native `requestAnimationFrame` support.

Note that the reason for indiscriminately polyfilling `requestAnimationFrame` in iOS, see PR 4961, was apparently because of a bug in iOS 6.
However, according to [Wikipedia](https://en.wikipedia.org/wiki/IOS_version_history#iOS_8): "Support for iOS 8 ended in 2017.", hence the lowest version currently supported is iOS 9.
This commit is contained in:
Jonas Jenwald 2017-11-15 15:54:08 +01:00
parent f9a0515452
commit d5174cd826
1 changed files with 0 additions and 30 deletions
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30
src/shared/compatibility.js
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@ -531,36 +531,6 @@ PDFJS.compatibilityChecked = true;
}
})();
// Support: IE<10, Android<4.0, iOS
(function checkRequestAnimationFrame() {
function installFakeAnimationFrameFunctions() {
window.requestAnimationFrame = function (callback) {
return window.setTimeout(callback, 20);
};
window.cancelAnimationFrame = function (timeoutID) {
window.clearTimeout(timeoutID);
};
}
if (!hasDOM) {
return;
}
if (isIOS) {
// requestAnimationFrame on iOS is broken, replacing with fake one.
installFakeAnimationFrameFunctions();
return;
}
if ('requestAnimationFrame' in window) {
return;
}
window.requestAnimationFrame = window.mozRequestAnimationFrame ||
window.webkitRequestAnimationFrame;
if (window.requestAnimationFrame) {
return;
}
installFakeAnimationFrameFunctions();
})();
// Support: Android, iOS
(function checkCanvasSizeLimitation() {
if (isIOS || isAndroid) {