SOURCE

var Main = {
    data() {
      return {
        tabPosition: 'bottom'
      };
    }
  };
var Ctor = Vue.extend(Main)
new Ctor().$mount('#app')

<script src="//unpkg.com/vue/dist/vue.js"></script>
<script src="//unpkg.com/element-ui@2.4.0/lib/index.js"></script>
<div id="app">
<template>
  <el-radio-group v-model="tabPosition" style="margin-bottom: 30px;">
    <el-radio-button label="top">top</el-radio-button>
    <el-radio-button label="right">right</el-radio-button>
    <el-radio-button label="bottom">bottom</el-radio-button>
    <el-radio-button label="left">left</el-radio-button>
  </el-radio-group>

  <el-tabs :tab-position="tabPosition" style="height: 200px;">
    <el-tab-pane label="用户管理">用户管理</el-tab-pane>
    <el-tab-pane label="配置管理">配置管理</el-tab-pane>
    <el-tab-pane label="角色管理">角色管理</el-tab-pane>
    <el-tab-pane label="定时任务补偿">定时任务补偿</el-tab-pane>
  </el-tabs>
</template>
</div>

@import url("//unpkg.com/element-ui@2.4.0/lib/theme-chalk/index.css");