requestAnimationFramePolyfill.js.flow

/**
 * 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 requestAnimationFramePolyfill
 */
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;