vue-cli-3+element-ui 按需引入element-ui的配置

需要安装的

cnpm install element-ui -S

cnpm install  babel-plugin-import --save

npm install babel-plugin-component -D

然后在babel.config.js中

module.exports = {
  presets: [
    ["@babel/preset-env", { "modules": false }]
  ],
  "plugins": [
    [
      "component",
      {
        "libraryName": "element-ui",
        "styleLibraryName": "theme-chalk"
      }
    ]
  ]
}

在main.js中

import { Button } from 'element-ui';

Vue.use(Button);