作用域插槽的样式由父组件决定，内容却由子组件控制。

在el-table使用作用域插槽

<el-table>
  <el-table-column 
	slot-scope=" { row, column, $index }">
  </el-table-column>
</el-table>

在el-tree使用作用域插槽

<el-tree>
  <span class="custom-tree-node" slot-scope="{ node, data }">
</el-tree>

 

 

<el-table style="width: 100%" border :data="list">
  <el-table-column type="index" label="序号" width="80px" align="center">
  </el-table-column>
  <el-table-column prop="tmName" label="品牌名称" width="width">
  </el-table-column>
  <el-table-column prop="logoUrl" label="品牌LOGO" width="width">
    <template slot-scope="{ row, $index }">
      <img :src="row.logoUrl" alt="" style="width: 100px; height: 100px" />
    </template>
  </el-table-column>
  <el-table-column prop="prop" label="操作" width="width">
    <template slot-scope="{ row, $index }">
      <el-button
        type="warning"
        icon="el-icon-edit"
        size="mini"
        @click="updateTradeMark(row)"
        >修改</el-button
      >
      <el-button
        type="danger"
        icon="el-icon-delete"
        size="mini"
        @click="deleteTradeMark(row)"
        >删除</el-button
      >
    </template>
  </el-table-column>
</el-table>