2a09d1a4
 liuqimichale
添加宜春 天水 宣化
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import global from './global.js';
/**
* A shim for the requestAnimationFrame which falls back to the setTimeout if
* first one is not supported.
*
* @returns {number} Requests' identifier.
*/
export default (() => {
if (typeof requestAnimationFrame === 'function') {
// It's required to use a bounded function because IE sometimes throws
// an "Invalid calling object" error if rAF is invoked without the global
// object on the left hand side.
return requestAnimationFrame.bind(global);
}
return callback => setTimeout(() => callback(Date.now()), 1000 / 60);
})();
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