reactjs - 用于代码分割的 Webpack 配置不适用于生产构建

Question

使用 Webpack 构建 ReactJS 应用程序。最近对使用代码分割来减少应用程序大小感兴趣。

我尝试实现一个包装 System.import() 的自定义 HOC:

/* async/index.tsx */
... at a very high level looked like...
class Async extends React ... {
    componentWillMount() {
        this.props.load.then(c => {
            this.component = c;
            this.setState({loaded:true});
        }
    }
    render() {
        return this.component ? <this.component.default {...this.props} /> : <span />;
    }
}

/* async/foo/index.tsx */
import Async from 'async';
const Foo = (props) => (
    <Async
      {...props}
      load={System.import('async/foo/body')}
    />);

class Foo ... {
    ...
    render = () => <Foo myProp={'bar'} />;
}

目前我正在尝试使用react-loadable ( https://github.com/thejameskyle/react-loadable )，这是一个基本上做同样事情但有一些额外功能的包。

问题

这两种方法在本地都可以正常工作，但在部署时就不起作用。 Webpack 配置源自 2017 年 3 月上旬的 React-Starter-App。我的直觉告诉我，webpack 配置是问题的根源，但我不知道如何调试它。

开发配置(有效)

/* relevant configs */
module.exports = {
  entry: [
      require.resolve('react-dev-utils/webpackHotDevClient'),
      require.resolve('./polyfills'),
      paths.appIndexJs
  ],
  output: {
    path: paths.appBuild,
    pathinfo: true,
    filename: 'static/js/bundle.js',
    publicPath: publicPath
  },
  ...
  plugins: [
    new ExtractTextPlugin({filename: 'style.css', allChunks: true}),
    new InterpolateHtmlPlugin(env.raw),
    new HtmlWebpackPlugin({
      inject: true,
      template: paths.appHtml,
    }),
    new BundleAnalyzerPlugin(),
    new webpack.DefinePlugin(env.stringified),
    new webpack.HotModuleReplacementPlugin(),
    new CaseSensitivePathsPlugin(),
    new webpack.LoaderOptionsPlugin({
      debug: true
    }),
    new WatchMissingNodeModulesPlugin(paths.appNodeModules)
  ]
}

暂存配置(不起作用)

module.exports = {
  bail: true,
  devtool: 'source-map',
  entry: [
    require.resolve('./polyfills'),
    paths.appIndexJs
  ],
  output: {
    path: paths.appBuildStaging,
    filename: 'static/js/[name].[chunkhash:8].js',
    chunkFilename: 'static/js/[name].[chunkhash:8].chunk.js',
    publicPath: publicPath,
  },
  resolve: {
    modules: ['node_modules', paths.appNodeModules].concat(paths.nodePaths).concat(paths.appSrc),
    extensions: ['.ts', '.tsx', '.scss', '.js', '.json', '.jsx']
  },
  ...
  plugins: [
    new InterpolateHtmlPlugin(env.raw),
    new HtmlWebpackPlugin({
      inject: true,
      template: paths.appHtml,
      minify: {
        removeComments: true,
        collapseWhitespace: true,
        removeRedundantAttributes: true,
        useShortDoctype: true,
        removeEmptyAttributes: true,
        removeStyleLinkTypeAttributes: true,
        keepClosingSlash: true,
        minifyJS: true,
        minifyCSS: true,
        minifyURLs: true,
      },
    }),
    new webpack.optimize.CommonsChunkPlugin({
      name: 'vendor',
      minChunks: function (module) {
        // this assumes your vendor imports exist in the node_modules directory
        return module.context && module.context.indexOf('node_modules') !== -1;
      }
    }),
    //CommonChunksPlugin will now extract all the common modules from vendor and main bundles
    new webpack.optimize.CommonsChunkPlugin({ 
      name: 'manifest' //But since there are no more common modules between them we end up with just the runtime code included in the manifest file
    }),
    new BundleAnalyzerPlugin(),
    new webpack.DefinePlugin(env.stringified),
    new webpack.optimize.UglifyJsPlugin({
      compress: {
        screw_ie8: true, //. React doesn't support IE8
        warnings: false,
        drop_console: false,
      },
      mangle: {
        screw_ie8: true,
      },
      output: {
        comments: false,
        screw_ie8: true,
      },
      sourceMap: true,
    }),
    new ExtractTextPlugin({
      filename: cssFilename,
    }),
    new ManifestPlugin({
      fileName: 'asset-manifest.json',
    }),
  ]
}

错误:React-loadable 吞掉了所有错误(手掌+脸部)，所以我无法从该代码中提供有用的错误。我的自定义组件会在引导加载程序中抛出错误 bootstrap 6a12c6c…:54 Uncaught (in Promise) TypeError: Cannot read property 'call' of undefined

在我的自定义 HOC 的网络流量中，未加载额外的 bundle 。在react-loadable的网络流量中，包被加载，但从未被处理。

Answer 1

经过这么长时间，在升级了 Typescript 和 Webpack 之后，事实证明使用 CommonsChunk 插件不知何故搞砸了。

尚未调查原因，但注释掉以下内容有效:

// new webpack.optimize.CommonsChunkPlugin({
//   name: 'vendor',
//   minChunks: function (module) {
//     return module.context && module.context.indexOf('node_modules') !== -1;
//   }
// }),