vent-forewarn-micro/src/utils/animation.ts

import { isServer } from '/@/utils/is';
let lastTime = 0;
const prefixes = 'webkit moz ms o'.split(' ');

let requestAnimationFrame: typeof window.requestAnimationFrame;
let cancelAnimationFrame: typeof window.cancelAnimationFrame;
(() => {
  const NO_LOOP: any = () => {};
  const getWindowFrame = (name: string) => {
    return name as any;
  };
  if (isServer) {
    requestAnimationFrame = cancelAnimationFrame = NO_LOOP;
  } else {
    requestAnimationFrame = window.requestAnimationFrame;
    cancelAnimationFrame = window.cancelAnimationFrame;
    let prefix;
    for (let i = 0; i < prefixes.length; i++) {
      if (requestAnimationFrame && cancelAnimationFrame) {
        break;
      }
      prefix = prefixes[i];
      requestAnimationFrame =
        requestAnimationFrame || window[getWindowFrame(prefix + 'RequestAnimationFrame')];
      cancelAnimationFrame =
        cancelAnimationFrame ||
        window[getWindowFrame(prefix + 'CancelAnimationFrame')] ||
        window[getWindowFrame(prefix + 'CancelRequestAnimationFrame')];
    }

    // If the current browser does not support requestAnimationFrame and cancelAnimationFrame, it will fall back to setTimeout
    if (!requestAnimationFrame || !cancelAnimationFrame) {
      requestAnimationFrame = function (callback: Fn) {
        const currTime = new Date().getTime();
        const timeToCall = Math.max(0, 16 - (currTime - lastTime));
        const id = window.setTimeout(() => {
          /* eslint-disable-next-line */
          callback(currTime + timeToCall);
        }, timeToCall);
        lastTime = currTime + timeToCall;
        return id;
      };

      cancelAnimationFrame = function (id: number) {
        window.clearTimeout(id);
      };
    }
  }
})();

export { requestAnimationFrame, cancelAnimationFrame };