Element UI 是一款基于 Vue 的桌面端组件库，提供了丰富的PC端组件，简化了常用组件的封装，大大降低了开发难度。随着 Vue 版本的更新，Element-UI 2.x 升级到了Element Plus 。

使用 Vue CLI 3 需要安装 Element Plus，具体方式如下：

 npm 全局安装：

npm install element-plus --save

打开 package.json 文件可以查看是否安装成功以及安装的版本信息：

在 main.js 文件中引入：

import { createApp } from 'vue'
import ElementPlus from 'element-plus'
import 'element-plus/dist/index.css'
import App from './App.vue'

const app = createApp(App)

app.use(ElementPlus)
app.mount('#app')

基本使用：

App.vue

<template>
<div id="app">
 <h2>Element-UI 测试</h2>
  <el-row class="mb-4">
    <el-button>Default</el-button>
    <el-button type="primary">Primary</el-button>
    <el-button type="success">Success</el-button>
    <el-button type="info">Info</el-button>
    <el-button type="warning">Warning</el-button>
    <el-button type="danger">Danger</el-button>
    <el-button>中文</el-button>
  </el-row>

  <el-row class="mb-4">
    <el-button plain>Plain</el-button>
    <el-button type="primary" plain>Primary</el-button>
    <el-button type="success" plain>Success</el-button>
    <el-button type="info" plain>Info</el-button>
    <el-button type="warning" plain>Warning</el-button>
    <el-button type="danger" plain>Danger</el-button>
  </el-row>

  <el-row class="mb-4">
    <el-button round>Round</el-button>
    <el-button type="primary" round>Primary</el-button>
    <el-button type="success" round>Success</el-button>
    <el-button type="info" round>Info</el-button>
    <el-button type="warning" round>Warning</el-button>
    <el-button type="danger" round>Danger</el-button>
  </el-row>

  <el-row>
    <el-button :icon="Search" circle />
    <el-button type="primary" :icon="Edit" circle />
    <el-button type="success" :icon="Check" circle />
    <el-button type="info" :icon="Message" circle />
    <el-button type="warning" :icon="Star" circle />
    <el-button type="danger" :icon="Delete" circle />
  </el-row>
</div>
</template>

 运行结果如下：

官网版本：

可以看到 icon 图标信息并没有成功显示。这是因为，图标由在 Element-UI 版本中的样式，在Element Plus 中被封装成了一个个组件。

安装图标库：

npm install @element-plus/icons-vue

然后在 main.js 中使用 for 循环将图标以组件的形式全部引入：

import { createApp } from 'vue'
import ElementPlus from 'element-plus'
import 'element-plus/dist/index.css'
import App from './App.vue'
import * as ElIcon from '@element-plus/icons-vue'

const app = createApp(App)

for (let iconName in ElIcon){
  app.component(iconName, ElIcon[iconName])
}
app.use(ElementPlus)
app.mount('#app')

需要通过标签的方式使用：

<el-icon><Search/></el-icon>

App.vue 

<template>
<div id="app">
 <h2>Element-UI 测试</h2>
 <br>
  <!-- 在组件中使用 -->
  <el-row>
    <el-button circle icon = "Search"></el-button>
    <el-button type="primary" circle icon = "Edit"></el-button>
    <el-button type="success" circle icon = "Check"></el-button>
    <el-button type="info" circle icon = "Message"></el-button>
    <el-button type="warning" circle icon = "Star"></el-button>
    <el-button type="danger" circle icon = "Delete"></el-button>
  </el-row>
  <br>
  <!-- 结合 el-icon 使用 -->
  <el-row>
    <el-icon><Search/></el-icon>
    <el-icon><Edit/></el-icon>
    <el-icon><Check/></el-icon>
    <el-icon><Message/></el-icon>
    <el-icon><Star/></el-icon>
    <el-icon><Delete/></el-icon>
  </el-row>
</div>
</template>

效果如下：

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