<template>
<!-- 处理element表格表头文字提示特别添加全局注册组件 -->
<div class="promt-message-tooltip">
 <el-tooltip effect="light" placement="left">
  <div slot="content">
   <p v-for="item in messages" :key="item">
    {{item}}
   </p>
  </div>
  <i class="el-icon-question" class="tips-icon"></i>
 </el-tooltip>
</div>
</template>
<script>
export default {
 props: ['messages']
}
</script>
<style lang="scss">
.promt-message-tooltip {
 .tips-icon {
 color:#409eff;
 margin-left:5px;
 font-size:14px;
 }
}
</style>

import promptMessage from './promptMessage.vue'
export default {
 install: (Vue) => {
 Vue.component('promptMessage', promptMessage)
 }
}

import promptMessage from '@/components/promptMessage/index.js'
Vue.use(promptMessage)

<template>
<el-table tooltip-effect="light" :data="dataList" border >
 <el-table-column label="操作" :render-header="renderHeader">
 <template slot-scope="scope">删除</template>
 </el-table-column>
</el-table>
</template>
<script>
export default {
 methods: {
 // render 事件
 renderHeader (h, { column }) {
  return h(
  'div', {
   style: 'display:flex;margin:auto;'
  },
  [
   h('span', column.label),
   // 直接用组件就完事了
   h('prompt-message', {
   props: { messages: ['kaimo需要的tips！'] }
   })
  ]
  )
 }
 }
}
</script>