ElementUI 按需引入

1.安装element-ui

npm i element-ui -S

2. 安装插件 babel-plugin-component

npm i babel-plugin-component -D

3. 修改babel.config.js

module.exports = {
  presets: ['@vue/cli-plugin-babel/preset'],
  plugins: [
    [
      'component',
      {
        libraryName: 'element-ui',
        styleLibraryName: 'theme-chalk',
      },
    ],
  ],
}

4. 在src下建一个文件夹xxxxxx,并创建index.js

import Vue from 'vue'; 
import { Button, Select } from 'element-ui'; 
import App from './App.vue';

Vue.use(Select);
Vue.use(Button);

5. main.js

import x from './xxxxxx/index'
Vue.use(x)