create react app 项目引入 src 外部的组件,提示以下错误,

Module parse failed: Unexpected token (7:4)
File was processed with these loaders:
 * ../../node_modules/.pnpm/@pmmmwh+react-refresh-webpack-plugin@0.5.11_react-refresh@0.11.0_webpack-dev-server@4.15.2_webpack@5.91.0/node_modules/@pmmmwh/react-refresh-webpack-plugin/loader/index.js
 * ../../node_modules/.pnpm/source-map-loader@3.0.2_webpack@5.91.0/node_modules/source-map-loader/dist/cjs.js
You may need an additional loader to handle the result of these loaders.

这是由于 cra 的默认配置只编译 src 下的文件,对于 src 外部的文件没有配置相应的 loader 来处理,需要修改 webpack 的配置。可以通过 react-app-rewired 和 customize-cra 来解决这个问题。

安装 react-app-rewired 和 customize-cra

pnpm add react-app-rewired customize-cra -D

在根目录下新建 config-overrides.js 文件,新增以下内容

const path = require('path')

const { override, babelInclude } = require('customize-cra')

module.exports = function (config, env) {
  return Object.assign(
    config,
    override(
      babelInclude([
        path.resolve('src'),
        path.resolve('../shared'), // 新增需要编译的文件目录
      ])
    )(config, env)
  )
}

配置完成后,还需要修改启动和构建命令,修改 package.json 文件的 script 命令如下

"scripts": {
-   "start": "react-scripts start",
+   "start": "react-app-rewired start",
-   "build": "react-scripts build",
+   "build": "react-app-rewired build",
-   "test": "react-scripts test",
+   "test": "react-app-rewired test",
    "eject": "react-scripts eject"
}

这样就可以正常编译了。

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