adui
Version:
<div> <img src="https://wxa.wxs.qq.com/mpweb/delivery/legacy/wxadtouch/upload/t1/od834zef_52939fc6.png" style="margin:40px 0 0 -8px; background-color: #fcfcfc; box-shadow: none;" /> </div>
30 lines (25 loc) • 2.94 kB
JavaScript
function requestAnimationFramePolyfill() {
var lastTime = 0;
return function (callback) {
var currTime = new Date().getTime();
var timeToCall = Math.max(0, 16 - (currTime - lastTime));
var id = window.setTimeout(function () {
callback(currTime + timeToCall);
}, timeToCall);
lastTime = currTime + timeToCall;
return id;
};
}
function getRequestAnimationFrame() {
if (typeof window === "undefined") {
return function () {};
}
var _window = window,
requestAnimationFrame = _window.requestAnimationFrame;
if (requestAnimationFrame) {
return requestAnimationFrame;
}
return requestAnimationFramePolyfill();
}
export { getRequestAnimationFrame };
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