window.addEventListener("scroll", function(){
  console.log('scrolling');
  });

<!--设备列表-->
<div class="deviceWrapper" ref="viewBox">
 <mu-refresh-control :refreshing="refreshing" :trigger="trigger" @refresh="refresh"/>
 <div class="demo-grid">
 <!--设备列表 手机一行两列 pad一行4列-->
 <mu-row>
  <mu-col v-for="device in devicesList" width="50" tablet="25" desktop="25">
  <deviceCardView :device-data="device""></devicelightCardView>
  </mu-col>
 </mu-row>
 </div>
 <p class="bottomLine" v-bind:class="{bottomLineVisible:isScroll}">---------------------我是有底线的---------------------</p>
</div>

mounted() {
// 通过$refs获取dom元素
 this.box = this.$refs.viewBox
 // 监听这个dom的scroll事件
 this.box.addEventListener('scroll', () => {
 console.log(" scroll " + this.$refs.viewBox.scrollTop)
 //以下是我自己的需求，向下滚动的时候显示“我是有底线的（类似支付宝）”
 this.isScroll=this.$refs.viewBox.scrollTop>0
 }, false)
}