webpack-dist.config.js

const path = require('path');
const UglifyJsPlugin = require('webpack/lib/optimize/UglifyJsPlugin');
const DefinePlugin = require('webpack/lib/DefinePlugin');
let distConfig = require('./webpack.config');

distConfig.output.path = path.resolve(__dirname, 'public/cdn');
distConfig.output.publicPath = '//url.cn/';
distConfig.output.filename = '[chunkhash].js';
distConfig.resolve.alias = {
  'moment': 'moment/min/moment.min.js',
  'react': 'react/dist/react.min.js',
  'react-dom': 'react-dom/dist/react-dom.min.js'
};
distConfig.plugins.push(...[
  new DefinePlugin({
    'process.env': {
      'NODE_ENV': JSON.stringify('production')
    }
  }),
  new UglifyJsPlugin({
    // 最紧凑的输出
    beautify: false,
    // 删除所有的注释
    comments: false,
    compress: {
      // 在UglifyJs删除没有用到的代码时不输出警告
      warnings: false,
      // 删除所有的 `console` 语句，可以兼容ie浏览器
      drop_console: true,
      // 内嵌定义了但是只用到一次的变量
      collapse_vars: true,
      // 提取出出现多次但是没有定义成变量去引用的静态值
      reduce_vars: true,
    }
  }),
])
module.exports = distConfig;

webpack.config.js

const fs = require('fs');
const path = require('path');
const IgnorePlugin = require('webpack/lib/IgnorePlugin');
const AutoWebPlugin = require('web-webpack-plugin').AutoWebPlugin;

module.exports = {
  output: {
    publicPath: '',
    filename: '[name].js',
  },
  resolve: {
    // 加快搜索速度
    modules: [path.resolve(__dirname, 'node_modules')],
    // es tree-shaking
    mainFields: ['jsnext:main', 'browser', 'main'],
    // 加快编译速度
    alias: {
      'moment': 'moment/min/moment.min.js',
      'react': 'react/dist/react.js',
      'react-dom': 'react-dom/dist/react-dom.js'
    }
  },
  module: {
    // 这些库都是不依赖其它库的库 不需要解析他们可以加快编译速度
    noParse: /node_modules\/(moment|chart\.js)/,
    loaders: [
      {
        test: /\.js$/,
        // cacheDirectory 缓存babel编译结果加快重新编译速度
        loader: 'babel-loader?cacheDirectory',
        // 只命中src目录里的js文件，加快webpack搜索速度
        include: path.resolve(__dirname, 'src')
      },
      {
        test: /\.scss$/,
        // 压缩css
        loaders: ['style-loader', 'css-loader?minimize', 'sass-loader'],
        include: path.resolve(__dirname, 'src')
      },
      {
        test: /\.css$/,
        // 压缩css
        loaders: ['style-loader', 'css-loader?minimize'],
      },
      {
        test: /\.(gif|png|eot|woff|ttf|pdf)$/,
        loader: 'file-loader',
      },
    ]
  },
  performance: {
    "hints": false
  },
  entry: {
    badjs: './src/assets/badjs',
    polyfill: './src/assets/polyfill',
    ie_polyfill: './src/assets/ie-polyfill',
  },
  plugins: [
    new AutoWebPlugin('./src/pages/', {
      template: './src/assets/template.html',
      commonsChunk: 'common'
    }),
  ]
};