防抖节流（立即执行和延时执行）

/**
     * @description: 
     * @param {*} fn
     * @param {*} time
     * @param {*} type 1表示立即执行，其他表示非立即执行
     * @return {*}
     */
    function fangdou(fn, time, type){
      if(type == 1){
        let timer = null;
        let canRun = true;
        return function(){
          if(timer){
            clearTimeout(timer);
            canRun = false;
          }
          timer = setTimeout(()=>{
            timer = null;
            canRun = true;
          }, time)
          canRun && fn(...arguments)
        }
      }else{
        let timer = null;
        return function(){
          console.log("fff", arguments)
          if(timer){
            clearTimeout(timer)
          }
          timer = setTimeout(()=>{
            fn(...arguments)
            timer = null
          }, time)
        }
      }
    }

/**
     * @description: 
     * @param {*} fn
     * @param {*} time
     * @param {*} type 1表示立即执行，其他表示非立即执行
     * @return {*}
     */
    function jieliu(fn, time, type){
      let canRun = true;
      if(type == 1){
        return function(){
          if(canRun){
            fn(...arguments);
            canRun = false;
            setTimeout(()=>{
              canRun = true
            }, time)
          }
        }
      }else{
        return function(){
          if(canRun){
            canRun = false;
            setTimeout(()=>{
              fn(...arguments)
              canRun = true
            }, time)
          }
        }
      }
    }