ng-zorro-antd
Version:
An enterprise-class UI components based on Ant Design and Angular
41 lines • 6.41 kB
JavaScript
// tslint:disable: typedef no-invalid-this
const availablePrefixes = ['moz', 'ms', 'webkit'];
function requestAnimationFramePolyfill() {
let lastTime = 0;
return function (callback) {
const currTime = new Date().getTime();
const timeToCall = Math.max(0, 16 - (currTime - lastTime));
const id = setTimeout(() => {
callback(currTime + timeToCall);
}, timeToCall);
lastTime = currTime + timeToCall;
return id;
};
}
function getRequestAnimationFrame() {
if (typeof window === 'undefined') {
return () => 0;
}
if (window.requestAnimationFrame) {
// https://github.com/vuejs/vue/issues/4465
return window.requestAnimationFrame.bind(window);
}
const prefix = availablePrefixes.filter(key => `${key}RequestAnimationFrame` in window)[0];
return prefix ? window[`${prefix}RequestAnimationFrame`] : requestAnimationFramePolyfill();
}
export function cancelRequestAnimationFrame(id) {
if (typeof window === 'undefined') {
return null;
}
if (window.cancelAnimationFrame) {
return window.cancelAnimationFrame(id);
}
const prefix = availablePrefixes.filter(key => `${key}CancelAnimationFrame` in window || `${key}CancelRequestAnimationFrame` in window)[0];
return prefix
? (window[`${prefix}CancelAnimationFrame`] || window[`${prefix}CancelRequestAnimationFrame`])
// @ts-ignore
.call(this, id)
: clearTimeout(id);
}
export const reqAnimFrame = getRequestAnimationFrame();
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