webpack.config.dev.js

const webpack = require('webpack');
const path = require('path');
const OpenBrowserPlugin = require('open-browser-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const DashboardPlugin = require('webpack-dashboard/plugin');

const config = {
  devtool: "source-map", // or "inline-source-map"
  entry: [
    'webpack/hot/dev-server',
    'webpack-dev-server/client?http://localhost:8080',
    path.resolve(__dirname, 'app/index.js')       // 定义入口文件
  ],
  output: {                                       // 定义出口目录
    path: path.resolve(__dirname, 'build'),
    filename: 'bundle.js',
    publicPath: 'http://localhost:8080/' // html引用路径
  },
  resolve: {                                      // resolve 指定可以被 import 的文件后缀
    extensions: ['', '.js', '.jsx']
  },
  module: {
    loaders: [
      {
        test: /\.js|jsx$/, // 检测哪些文件需要此loader，是一个正则表达式，用正则来匹配文件路径，这段意思是匹配 js 或者 jsx
        exclude: /(node_modules|bower_components)/,
        loaders: ['babel']  // 加载模块 "babel" 是 "babel-loader" 的缩写
      },
      {
        test: /(\.css|\.scss)$/,
        loaders: ["style", "css?sourceMap", "sass?sourceMap"]
      },
      {
        test: /\.(jpe?g|png|gif|svg)$/i,
        loaders: [
          'url?limit=10000&name=img/[hash:8].[name].[ext]',
          'image-webpack?{progressive:true, optimizationLevel: 7, interlaced: false, pngquant:{quality: "65-90", speed: 4}}'
        ]
      }
    ]
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: 'app/index.tpl.html',
      inject: 'body',
      filename: 'index.html'
    }),
    new webpack.DefinePlugin({
      'process.env.NODE_ENV': JSON.stringify('development'),
      __DEV__: JSON.stringify(JSON.parse(process.env.DEBUG || 'false'))
    }),
    new webpack.HotModuleReplacementPlugin(),
    new webpack.NoErrorsPlugin(),
    new OpenBrowserPlugin({ url: 'http://localhost:8080/' }),
    new DashboardPlugin()
  ]
};

module.exports = config;