【構建工具】webpack文件配置

webpack作爲前端構建工具已被廣泛使用，最近在做react+reflux+webpack的項目，於是在這裏保存一下webpack的配置，供以後查閱。

webpack在開發模式下的配置：

/*
 * Webpack development server configuration
 *
 * This file is set up for serving the webpack-dev-server, which will watch for changes and recompile as required if
 * the subfolder /webpack-dev-server/ is visited. Visiting the root will not automatically reload.
 */
'use strict';
var webpack = require('webpack');

module.exports = {

  output: {
    filename: 'main_newba4.0.js',
    publicPath: '/assets/'
  },

  cache: true,
  debug: true,
  devtool: false,
  entry: [
      'webpack/hot/only-dev-server',
      './src/scripts/components/main.js'
  ],

  stats: {
    colors: true,
    reasons: true
  },

  resolve: {
    extensions: ['', '.js'],
    alias: {
      'styles': __dirname + '/src/styles',
      'mixins': __dirname + '/src/scripts/mixins',
      'components': __dirname + '/src/scripts/components/',
      'stores': __dirname + '/src/scripts/stores/',
      'actions': __dirname + '/src/scripts/actions/',
      'config': __dirname + '/src/config/',
      'utils': __dirname + '/src/scripts/utils'
    }
  },
  module: {
    preLoaders: [{
      test: /\.js$/,
      exclude: /node_modules/,
      loader: 'jsxhint'
    }],
    loaders: [{
      test: /\.js$/,
      exclude: /node_modules/,
      loader: 'react-hot!babel-loader'
    }, {
      test: /\.css$/,
      loader: 'style-loader!css-loader'
    }, {
      test: /\.(png|jpg)$/,
      loader: 'url-loader?limit=8192'
    }]
  },

  plugins: [
    new webpack.HotModuleReplacementPlugin(),
    new webpack.NoErrorsPlugin()
  ]

};

webpack在發佈模式下的配置：

/*
 * Webpack distribution configuration
 *
 * This file is set up for serving the distribution version. It will be compiled to dist/ by default
 */

'use strict';

var webpack = require('webpack');

module.exports = {

  output: {
    publicPath: '/assets/',
    path: 'dist/assets/',
    filename: 'main_newba4.0.js'
  },

  debug: false,
  devtool: false,
  entry: {
    app: './src/scripts/components/main.js',
    vendor: ['classnames', 'lodash', 'moment', 'normalize.css',
             'react', 'react-router', 'reflux', 'uuid']
  },

  stats: {
    colors: true,
    reasons: false
  },

  plugins: [
    new webpack.optimize.DedupePlugin(),
    new webpack.optimize.UglifyJsPlugin(),
    new webpack.optimize.OccurenceOrderPlugin(),
    new webpack.optimize.AggressiveMergingPlugin(),
    new webpack.optimize.CommonsChunkPlugin('vendor', 'vendor.bundle_newba4.0.js')
  ],

  resolve: {
    extensions: ['', '.js'],
    alias: {
      'styles': __dirname + '/src/styles',
      'mixins': __dirname + '/src/scripts/mixins',
      'components': __dirname + '/src/scripts/components/',
      'stores': __dirname + '/src/scripts/stores/',
      'actions': __dirname + '/src/scripts/actions/',
      'config': __dirname + '/src/config/',
      'utils': __dirname + '/src/scripts/utils'
    }
  },

  module: {
    preLoaders: [{
      test: /\.js$/,
      exclude: /node_modules/,
      loader: 'jsxhint'
    }],
    loaders: [{
      test: /\.js$/,
      exclude: /node_modules/,
      loader: 'babel-loader'
    }, {
      test: /\.css$/,
      loader: 'style-loader!css-loader'
    }, {
      test: /\.(png|jpg)$/,
      loader: 'url-loader?limit=8192'
    }]
  }
};

通過比較可以看出開發模式和發佈模式文件的配置是不同的，比如webpack.HotModuleReplacementPlugin，熱模塊替換，它的作用在於文件內容更改時實時打包刷新頁面，在發佈模式下是不需要的，發佈模式需要做的是編譯、壓縮、提取公共部分生成vendor等工作。