create-react-app 引入antd-mobile，提示按需加载问题

1. 首先安装 babel-plugin-import

npm install babel-plugin-import --save-dev  
// or 
yarn add babel-plugin-import --save-dev

2. 对webpack.config.dev.js和webpack.config.prod.js 文件进行修改

在oneOf下

{
    test: /\.(js|jsx|mjs)$/,
    include: paths.appSrc,
    loader: require.resolve('babel-loader'),
    options: {
      plugins: [
           ['import', [{ libraryName: "antd-mobile", style: 'css' }]],
        ],
      cacheDirectory: true,
    },
  },

就ok了