按需导入的坑

1.webpack

　　npm install unplugin-vue-components

　　vue.config.js文件加段代码

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const Components = require('unplugin-vue-components/webpack')

const { ElementPlusResolver } = require('unplugin-vue-components/resolvers')
module.exports = {
  //   ...
  configureWebpack: {
    plugins: [
      Components({
        resolvers: [ElementPlusResolver()],
      }),
    ],
    module: {
      rules: [
        {
          test: /\.mjs$/,
          include: /node_modules/,
          type: 'javascript/auto',
        },
      ],
    },
  },
}

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module配置解决：Can’t import the named export ‘xxx’ from non EcmaScript module (only default export is available) 出现的报错

 

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　　使用时发现一些消息框组件样式竟然没有了，只能这样解决了

　　main.js接口文件

　　import 'element-plus/theme-chalk/el-message.css';

　　import 'element-plus/theme-chalk/el-notification.css';