webpack.development.config.js

const { resolve } = require('path');
require('dotenv').config();
const webpack = require('webpack');
const ExtractTextPlugin = require('extract-text-webpack-plugin');
const CopyWebpackPlugin = require('copy-webpack-plugin');
const WebpackShellPlugin = require('webpack-shell-plugin');
require('babel-polyfill')
const config = {
  devtool: 'cheap-module-eval-source-map',

  entry: [
    'babel-polyfill',
    'react-hot-loader/patch',
    'webpack-dev-server/client?http://localhost:3001',
    'webpack/hot/only-dev-server',
    './main.js',    
    './assets/scss/main.scss'
  ],
  resolve: {
      alias: {
          'd3': 'd3/index.js'
      }
  },
  output: {
    filename: 'js/bundle.js',
    path: resolve(__dirname, 'dist/assets'),
    publicPath: '',
  },
  mode: 'development',
  context: resolve(__dirname, 'client'),
  devServer: {
    hot: true,
    contentBase: resolve(__dirname, 'dist/assets'),
    watchContentBase: true,
    host: '0.0.0.0',
    port: 3001,

    historyApiFallback: true,
    overlay: {
      warnings: true,
      errors: true,
    },
    proxy: [
      {
        context: ['/api', '/tracker' , '/auth', '/ws', '/js/variables.js', '/sockjs-node'],
        target: 'http://localhost:3000',
        secure: false,
        changeOrigin: true,
        ws: true
      },
    ],
  },

  module: {
    rules: [
      {
        enforce: 'pre',
        test: /\.js$/,
        exclude: /node_modules/,
        loader: 'eslint-loader'
      },
      {
        test: /\.js$/,
        loaders: [
          'babel-loader',
        ],
        exclude: /node_modules/,
      },      
      {
        test: /\.css$/,
        use: ExtractTextPlugin.extract({
          fallback: 'style-loader',
          use: ['css-loader']
        }),
      },
      {
        test: /\.txt$/i,
        use: 'raw-loader',
      },
      {
        test: /\.scss$/,
        exclude: /node_modules/,
        use: ExtractTextPlugin.extract({
          fallback: 'style-loader',
          use: [
            'css-loader',
            {
              loader: 'sass-loader',
              query: {
                sourceMap: false,
              },
            },
          ],
          publicPath: '../'
        }),
      },
      {
        test: /\.(png|jpg|gif)$/,
        use: [
          {
            loader: 'url-loader',
            options: {
              limit: 100,
              mimetype: 'image/png',
              name: 'images/[name].[ext]',
            }
          }
        ],
      },
      {
        test: /\.(png|jpg|gif)$/,
        use: [
          {
            loader: 'file-loader',
            options: {
              name: 'images/[name].[ext]',
            }
          }
        ],
      },
      {
        test: /\.eot(\?v=\d+.\d+.\d+)?$/,
        use: [
          {
            loader: 'file-loader',
            options: {
              name: 'fonts/[name].[ext]'
            }
          }
        ],
      },
      {
        test: /\.woff(2)?(\?v=[0-9]\.[0-9]\.[0-9])?$/,
        use: [
          {
            loader: 'url-loader',
            options: {
              limit: 8192,
              mimetype: 'application/font-woff',
              name: 'fonts/[name].[ext]',
            }
          }
        ],
      },
      {
        test: /\.[ot]tf(\?v=\d+.\d+.\d+)?$/,
        use: [
          {
            loader: 'url-loader',
            options: {
              limit: 8192,
              mimetype: 'application/octet-stream',
              name: 'fonts/[name].[ext]',
            }
          }
        ],
      },
      {
        test: /\.svg(\?v=\d+\.\d+\.\d+)?$/,
        use: [
          {
            loader: 'url-loader',
            options: {
              limit: 8192,
              mimetype: 'image/svg+xml',
              name: 'images/[name].[ext]',
            }
          }
        ],
      },
    ]
  },

  plugins: [
    new webpack.LoaderOptionsPlugin({
      test: /\.js$/,
      options: {
        eslint: {
          configFile: resolve(__dirname, '.eslintrc'),
          cache: false,
        }
      },
    }),
    new webpack.optimize.ModuleConcatenationPlugin(),    
    new ExtractTextPlugin({ filename: 'css/main.css', disable: false, allChunks: true }),
    new CopyWebpackPlugin([{ from: 'assets/images', to: 'images' }]),
    new CopyWebpackPlugin([{ from: 'assets/fonts', to: 'fonts' }]),
    new CopyWebpackPlugin([{ from: 'index.html', to: 'index.html' }]),

    new CopyWebpackPlugin([{ from: 'vendors', to: 'vendors' }]),
    new CopyWebpackPlugin([{ from: 'assets/manifest.json', to: 'manifest.json' }]),
    new WebpackShellPlugin({ onBuildEnd: ['npm run watch:server'] }),

    new webpack.EnvironmentPlugin({
      NODE_ENV: 'development'
    }),
    new webpack.HotModuleReplacementPlugin(),
  ],
};

module.exports = config;