vue3.0-infinite-scroll/lib/uitls.ts

支持Vue3的滚动加载插件

type Time = number;
export const throttle = function (fn: any, delay: Time, context: any) {
  let now: Time = 0;
  let lastExec: Time = 0;
  let timer: any = null;
  const execute = () => {
    fn(context);
    lastExec = now;
  };

  return () => {

    now = Date.now();

    if (timer) {
      clearTimeout(timer);
      timer = null;
    }

    if (lastExec) {
      const diff = delay - (now - lastExec);
      if (diff < 0) {
        execute();
      } else {
        timer = setTimeout(function () {
          execute();
        }, diff);
      }
    } else {
      execute();
    }
  };
};