29 lines
942 B
Plaintext
29 lines
942 B
Plaintext
/**
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* Copyright 2014-2015, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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* @providesModule requestAnimationFrame
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*/
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var emptyFunction = require('./emptyFunction');
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var nativeRequestAnimationFrame = require('./nativeRequestAnimationFrame');
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var lastTime = 0;
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var requestAnimationFrame = nativeRequestAnimationFrame || function (callback) {
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var currTime = Date.now();
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var timeDelay = Math.max(0, 16 - (currTime - lastTime));
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lastTime = currTime + timeDelay;
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return global.setTimeout(function () {
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callback(Date.now());
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}, timeDelay);
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};
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// Works around a rare bug in Safari 6 where the first request is never invoked.
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requestAnimationFrame(emptyFunction);
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module.exports = requestAnimationFrame; |