vue 按需加载elementui

https://www.youbaobao.xyz/admin-docs/guide/base/element.html

1. 安装 babel-plugin-component

npm install babel-plugin-component -D

2. 修改 babel.config.js：

{
  "presets": [["es2015", { "modules": false }]],
  "plugins": [
    [
      "component",
      {
        "libraryName": "element-ui",
        "styleLibraryName": "theme-chalk"
      }
    ]
  ]
}

3. 按需引入 Button 和 Message

import { Button, Message } from 'element-ui'

Vue.component(Button.name, Button)
Vue.prototype.$message = Message