监听滚动条滚到底部

 this.$nextTick(() => {
      var body = document.querySelector(".list-body");
      body.onscroll = () => {
        var scrollTop = body.scrollTop;
        var scrollHeight = body.scrollHeight;
        var windowHeight = body.clientHeight;
        if (scrollTop + windowHeight >= scrollHeight - 1) {
          // this.getScrollMsgList();
          console.log('触发');
        }
      };
    });