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【已解决】webpack配置为打包输出多文件但是只生成一个main.js

Webpack crifan 1065浏览 0评论

折腾:

【已解决】react-hot-boilerplate中导入ReactJS-AdminLTE的app.js出错:Uncaught SyntaxError: Unexpected token <

期间,去参考教程:

ruanyf/webpack-demos: a collection of simple demos of Webpack

WebPack 终极配置说明 – M.M.F 小屋

但是对于配置:

react-hot-boilerplate/react-hot-boilerplate/webpack.config.js

module.exports = {
  devtool: ‘cheap-module-eval-source-map’,
  entry: [
    ‘webpack-hot-middleware/client’,
    ‘./src/index.js’,
    ‘./src/adminlte_app.js’
  ],
  output: {
    // path: path.join(__dirname, ‘public’),
    path: path.join(__dirname, ‘build’),
    // filename: ‘bundle.js’,
    filename: ‘[name].js’,
    publicPath: ‘/public/’
    // publicPath: ‘http://localhost:3000/public/’
  },

希望输出多个js文件

但是实际上只输出了一个main.js

➜  react-hot-boilerplate git:(master) ✗ webpack
Hash: ec6f0254c4b649cd0ef9
Version: webpack 1.15.0
Time: 2954ms
  Asset     Size  Chunks             Chunk Names
main.js  4.94 MB       0  [emitted]  main
   [0] multi main 52 bytes {0} [built]
    + 370 hidden modules
➜  react-hot-boilerplate git:(master) ✗ webpack -p
Hash: 11548b4b7c360a26e7d3
Version: webpack 1.15.0
Time: 3945ms
  Asset     Size  Chunks             Chunk Names
main.js  4.91 MB       0  [emitted]  main
   [0] multi main 52 bytes {0} [built]
    + 370 hidden modules

webpack multiple entry but single output

webpack multiple entry but single main.js

Add multiple entry points to one bundle · Issue #15 · webpack/webpack

Multiple entry points -> multiple html outputs? · Issue #218 · jantimon/html-webpack-plugin

The need for multiple output paths? · Issue #1189 · webpack/webpack

javascript – In Webpack, how to get multiple outputs with a single entry main.js(having multiple css files inside files)? – Stack Overflow

Truly Multiple Entries with Webpack | Blog | Igor Kuzmenko

multiple entry points

code splitting

然后去改为:

  entry: {
    index: ‘./src/index.js’,
    vendor : [
      ‘webpack-hot-middleware/client’,
      ‘./src/adminlte_app.js’
    ]
  },
  output: {
    // path: path.join(__dirname, ‘public’),
    path: path.join(__dirname, ‘build’),
    // filename: ‘bundle.js’,
    filename: ‘[name].js’,
    publicPath: ‘/public/’
    // publicPath: ‘http://localhost:3000/public/’
  },
  plugins: [
    new webpack.optimize.CommonsChunkPlugin(‘vendor’, ‘vendor.bundle.js’),
    new webpack.HotModuleReplacementPlugin()
    // new webpack.optimize.UglifyJsPlugin({
    //   minimize: true
    // })
  ],

即可:

➜  react-hot-boilerplate git:(master) ✗ webpack
Hash: 6d3bcfa962b87e801338
Version: webpack 1.15.0
Time: 2879ms
           Asset     Size  Chunks             Chunk Names
        index.js  4.63 MB       0  [emitted]  index
vendor.bundle.js   259 kB       1  [emitted]  vendor
   [0] multi vendor 40 bytes {1} [built]
    + 357 hidden modules

但是还是很奇怪:

为何此处设置了多个entry和output,但是只得到一个main.js

而别人是没有设置CommonsChunkPlugin就应该可以正常的获得多个output的js才对啊。

webpack multiple output but single still main.js

webpack multiple entry but single main.js

然后通过官网:

multiple entry points

和看到阮一峰的demo中entry中是dict:

module.exports = {
  entry: {
    bundle1: ‘./main1.js’,
    bundle2: ‘./main2.js’
  },
  output: {
    filename: ‘[name].js’
  }
};

才明白:

原来多个入口的写法,就是dict,而不是我此处的list

【总结】

如果想要实现多个entry入口,然后输出多个output文件

则是,把entry从之前的:

通过把:entry的值,从一个值,改为dict的多个值:

  entry: {
    index: ‘./src/index.js’,
    vendor : [
      ‘webpack-hot-middleware/client’,
      ‘./src/adminlte_app.js’
    ]
  },

而不是(之前错误的写法)entry的值是list:

  entry: [
    ‘webpack-hot-middleware/client’,
    ‘./src/index.js’,
    ‘./src/adminlte_app.js’
  ],

另外对于是否加CommonsChunkPlugin,则是无所谓的。

至少是对于想要输出多个js文件来说。而对于CommonsChunkPlugin的含义,则以后再去研究。

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