监听element-ui table滚动事件的方法

<el-table 
 :data="logList" 
 :show-header="false" 
 row-class-name="table-row-class" 
 height="700" 
 ref="table" 
 @row-click="rowClick">
 <el-table-column type="expand">
  <el-table-column
  label="log信息"
  prop="message">
 </el-table-column>
</el-table>

 mounted() {
  // 获取需要绑定的table
  this.dom = this.$refs.table.bodyWrapper
  this.dom.addEventListener('scroll', () => {
   // 滚动距离
   let scrollTop = this.dom.scrollTop
   // 变量windowHeight是可视区的高度
   let windowHeight = this.dom.clientHeight || this.dom.clientHeight
   // 变量scrollHeight是滚动条的总高度
   let scrollHeight = this.dom.scrollHeight || this.dom.scrollHeight
   if (scrollTop + windowHeight === scrollHeight) {
    // 获取到的不是全部数据 当滚动到底部 继续获取新的数据
    if (!this.allData) this.getMoreLog()
    console.log('scrollTop', scrollTop + 'windowHeight', windowHeight + 'scrollHeight', scrollHeight)
   }
  })
 }

 getMoreLog() {
  ...
  this.dom.scrollTop = this.dom.scrollTop - 100
  ...
 }