vue监听滚动事件

 mounted() {
    window.addEventListener("scroll", this.handleScroll, true);
  },

handleScroll(e) {
      console.log(e.target.scrollTop);
      let top = e.target.scrollTop;
      if (top > 176) {
        this.earlyWarningName = "earlyWarningFixed";
      } else {
        this.earlyWarningName = "";
      }
    },

解决两个滚动条同时触发监听的效果：

if (e.target.offsetTop == 40) {
        return;
      }