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;
              //通过判断滚动条的top位置与可视网页之和与整个网页的高度是否相等来决定是否加载内容；
              if (this.b + this.c == this.a) {
                 // this.$router.push('./intelligenceb');
                  setTimeout(()=> {
                      console.log(滚动到底了)
                     
                  },800);
                //  return;
              }

          }