vue 项目结构鼠标滑动容器底部

mounted() {
    this.$nextTick(() => {
      // 进入nexTick
      var bady = document.getElementById("list"); // 在html中设置id为iii的div
      console.log("111list===", bady);
      // console.log("距顶部"+scrollTop+"可视区高度"+windowHeight+"滚动条总高度"+scrollHeight);
      bady.onscroll = () => {
        console.log(1111);
        // 获取距离顶部的距离
        var scrollTop = bady.scrollTop;
        if (scrollTop !== 0 && this.oldv == 0) {
          this.oldv = scrollTop;
        }
        // 获取可视区的高度
        var windowHeight = bady.clientHeight;
        // 获取滚动条的总高度
        var scrollHeight = bady.scrollHeight;
        console.log(
          "距顶部" +
            scrollTop +
            "可视区高度" +
            windowHeight +
            "滚动条总高度" +
            scrollHeight
        );
        if (scrollTop + windowHeight >= scrollHeight) {
          console.log("到达底部了");
        }
        if (scrollTop == 0 && this.oldv !== 0) {
          // console.log("到达头部了");
        }
      };
    });
  },