element-ui中el-table-column动态表头

<template>
  	<div id="app">
      <el-table :data="tableData" style="width: 100%">
       <!-- 静态表头 -->
       <el-table-column
    ​    :label="姓名"
    ​    prop="name"
       \></el-table-column>

       <!-- 动态表头 -->
       <el-table-column
    ​    v-for="(column, index) in dynamicColumns"
    ​    :key="'dynamic-' + index"
    ​    :label="column.label"
    ​    :prop="column.prop"
       \></el-table-column>
      </el-table>
 	</div>
</template>
<script>

export default {
	name: 'App',
	data() {
		 return {
			dynamicColumns: [
			​   { label: '年龄', prop: 'age' },
			​    { label: '城市', prop: 'city' },
			​    { label: '职位', prop: 'position' }
			   ],
			   tableData: [
			​    { name: '张三', age: 28, city: '北京', position: '工程师' },
			​    { name: '李四', age: 22, city: '上海', position: '设计师' },
			​    { name: '王五', age: 30, city: '广州', position: '产品经理' }
			]
		 };
	 }
};

</script>

<style scoped>
	\#app {
	     font-family: Avenir, Helvetica, Arial, sans-serif;
	     text-align: center;
	     color: #2c3e50;
	  }
</style>