27 lines
823 B
Plaintext
27 lines
823 B
Plaintext
/**
|
|
* Copyright (c) 2014-present, Facebook, Inc.
|
|
*
|
|
* This source code is licensed under the MIT license found in the
|
|
* LICENSE file in the root directory of this source tree.
|
|
*
|
|
* @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; |