el-table鼠标滑过某行，当前行样式（图标）变化

需求：鼠标滑过某行，当前行的图标变化

效果：

鼠标滑过某行后

P.s.：深拷贝这块内容有待完善

<el-table ref="table" class="table" :data="tableData" border :height="tableHeight"
      :header-cell-style="{'text-align':'center'}" :cell-style="{'text-align':'center'}" stripe @cell-mouse-enter="cellMouseEnter" @cell-mouse-leave="cellMouseLeave">
      <el-table-column prop="NO" type="index" label="序号" width="50">
        <template slot-scope="scope">
          <span>{{(page.currentPage - 1) * page.pageSize + scope.$index + 1}}</span>
        </template>
      </el-table-column>
      <el-table-column prop="name" label="名称">
        <template slot-scope="scope">
          <u @click="modify(scope.row)" style="cursor:pointer">{{scope.row.name}}</u>
        </template>
      </el-table-column>
      <el-table-column prop="1" label="1"></el-table-column>
      <el-table-column prop="2" label="2"></el-table-column>
      <el-table-column prop="3" label="3"></el-table-column>
      <el-table-column label="操作">
        <template slot-scope="scope">
          <img :src="delSelectedImg" title="删除" class="delBtn" @click="delete(scope.row)" v-if="scope.row.hoverFlag"/>
          <img :src="delImg" title="删除" class="delBtn" v-else/>
        </template>
      </el-table-column>
    </el-table>

cellMouseEnter(row){
	// console.log(row, event)
	// 注意必须是使用两次深拷贝，因为 hoverFlag 属性不是tableData原有的，直接修改无效，所以两次深拷贝重新赋值
	let Arr = JSON.parse(JSON.stringify(this.tableData))
	for (let index = 0; index < Arr.length; index++) {
	  const element = Arr[index]
	  console.log('element', element)
	  // 匹配滑过的当前行
	  if (element.id === row.id) {
	    element['hoverFlag'] = true
	  } else {
	    element['hoverFlag'] = false
	  }
	}
	this.tableData = JSON.parse(JSON.stringify(Arr))
	},
// 鼠标移出取消hover效果
cellMouseLeave(){
	for (let index = 0; index < this.tableData.length; index++) {
		 const element = this.tableData[index]
		 element['hoverFlag'] = false
	}
}

参考文章：el-table点击某行高亮；el-table设置hover效果；监听el-table点击某行变色；去除el-table的hover效果；监听el-table的hover事件