node_modules 项目目录外不被 Babel 转译 (7)

Question

我正在编写一个基于 Symfony4 和 ReactJS 的应用程序，并且我正在使用 webpack encore 构建一个包。此外，node_modules 目录在项目之外并且是符号链接 - 可能这是罪魁祸首，但我需要将 node_modules 保留在项目目录之外。

我遇到的问题与使用一些由 React 组件/HOC 组成的 npm 包（例如 @foes/react-i18n-routing）有关，因此它们需要被转译，但 babel 没有这样做，结果我收到与此类似的错误：

error  in ./node_modules/@foes/react-i18n-routing/dist/esm/component/withI18nRouting.js

Module parse failed: Unexpected token (6:2)
You may need an appropriate loader to handle this file type.
|
| export default Component => props => (
>   <I18nRoutingContext.Consumer>{context => <Component i18nRouting={context} {...props} />}</I18nRoutingContext.Consumer>
| );

据我所知，当我使用 Babel 7 时，我需要将 .babelrc 文件更改为 babel.config.js 以提供广泛的项目配置，但这还不够，我我仍然面临这个问题。

谁能给我指出正确的方向？

我尝试了各种配置，但在设置 babelrcRoots 时停止了。也许这是关键，但我无法正确设置它。

目录结构如下：

ROOT/
├── node_modules/
└── project/
    ├── assets/
    ├── package.json
    ├── babel.config.js
    └── webpack.config.js

这是babel.config.js

module.exports = function(api) {
  api.cache(true);

  const presets = ['@babel/preset-env', '@babel/preset-react'];
  const plugins = [
    '@babel/plugin-proposal-class-properties',
    'transform-es2015-modules-commonjs',
    'babel-plugin-dynamic-import-node'
  ];

  // const babelrcRoots = ['.', '../node_modules/*']; ????

  return {
    presets,
    plugins
  };
};

这是 webpack.config.js

const Encore = require('@symfony/webpack-encore');
const path = require('path');

Encore
  .setOutputPath('public/build/')
  .setPublicPath('/build')
  .addEntry('app', './assets/js/app.jsx')
  .splitEntryChunks()
  .enableSingleRuntimeChunk()
  .cleanupOutputBeforeBuild()
  .enableBuildNotifications()
  .enableSourceMaps(!Encore.isProduction())
  .enableVersioning(Encore.isProduction())
  .enableLessLoader()
  .enableReactPreset();


let config = Encore.getWebpackConfig();
config.resolve.alias['App'] = path.resolve(__dirname, 'assets/js');
// config.resolve.modules = [path.resolve('./node_modules'), path.resolve('../node_modules')]; here's the another try with no luck

module.exports = config;

这是 package.json

{
  "devDependencies": {
    "@babel/preset-react": "^7.0.0",
    "@symfony/webpack-encore": "^0.27.0",
    "babel-plugin-dynamic-import-node": "^2.2.0",
    "babel-polyfill": "^6.26.0",
    "babel-preset-env": "^1.7.0",
    "babel-preset-react": "^6.24.1",
    "core-js": "^3.0.0",
    "less-loader": "^4.1.0",
    "prop-types": "^15.7.2",
    "webpack-notifier": "^1.6.0"
  },
  "dependencies": {
    "@babel/plugin-proposal-class-properties": "^7.4.4",
    "@foes/react-i18n-routing": "^0.8.0",
    "enzyme": "^3.9.0",
    "enzyme-adapter-react-16": "^1.12.1",
    "history": "^4.9.0",
    "lodash.flatmap": "^4.5.0",
    "react": "^16.8.6",
    "react-dom": "^16.8.6",
    "react-router-dom": "^5.0.0",
    "react-router-named-routes": "0.0.23"
  }
}

Answer 1

您可以尝试配置 rootMode:"upward" 提到的 here 设置，如下所示：

babel --root-mode upward src -d lib

或者在 webpack 中

module: {
        rules: [{
            loader: "babel-loader",
            options: {
                rootMode: "upward",
            }
        }]
    }

node_modules 项目目录外不被 Babel 转译 (7)

node_modules outside of the project directory are not transpiled by Babel (7)

reactjs

webpack

babeljs

webpack-encore