按需引入组件 babel-plugin-import

安装babel-plugin-import依赖

npm install --save babel-plugin-import

vue
配置babel.config.js

module.exports = {
  plugins: [
    ['import', {
      libraryName: 'vant',
      libraryDirectory: 'es',
      style: true
    }, 'vant']
  ]
};

react next.js
根目录新建配置 .babelrc

{
    "presets": ["next/babel"],
    "plugins": [
        [
            "import",
            {
                "libraryName":"antd",
                "style":"css"
            }
        ]
    ]

}

代码中按需引入

// vue
import {Button} from 'vant'

// react
import {Button} from 'antd'

关于react打包的问题：https://blog.csdn.net/qq_37034928/article/details/106382883