webpack.dev.js

const webpack = require('webpack');
const merge = require('webpack-merge');
const path = require('path');
const common = require('./webpack.common.js');

const root = __dirname;

module.exports = merge(common, {
  entry: [
    'react-hot-loader/patch',
    'webpack-dev-server/client',
    'webpack/hot/only-dev-server',
    path.resolve(root, 'src/index.js'),
  ],
  output: {
    filename: 'bundle.js',
    path: path.resolve(root, 'dist'),
    publicPath: '/',
  },
  devtool: 'inline-source-map',
  devServer: {
    hot: true, // 激活服务器的HMR
    contentBase: './src/',
    compress: true,
    publicPath: '/',
    port: 8000,
    historyApiFallback: true,
  },
  plugins: [
    new webpack.HotModuleReplacementPlugin(), // 热替换插件
    new webpack.NamedModulesPlugin(), // 执行热替换时打印模块名字
  ],
});