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