vue滾動(dòng)到底了，怎么判斷鼠標(biāo)繼續(xù)下滑時(shí)翻頁(yè)？

   mounted(){
          document.body.scrollTop = 0;
          this.a=document.body.scrollHeight||document.documentElement.scrollHeight;
          this.c =  document.documentElement.clientHeight;
          window.addEventListener('scroll',this.menu);


      },
        menu() {
              this.a = document.body.scrollHeight || document.documentElement.scrollHeight;

              this.b = document.body.scrollTop || document.documentElement.scrollTop;
              //通過(guò)判斷滾動(dòng)條的top位置與可視網(wǎng)頁(yè)之和與整個(gè)網(wǎng)頁(yè)的高度是否相等來(lái)決定是否加載內(nèi)容；
              if (this.b + this.c == this.a) {
                 // this.$router.push('./intelligenceb');
                  setTimeout(()=> {
                      console.log(滾動(dòng)到底了)
                     
                  },800);
                //  return;
              }

          }