overflow_app/config/webpack/webpack.config.dev.js

const Path = require('path');
const Webpack = require('webpack');
const WebpackMerge = require('webpack-merge');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const WebpackDashboardPlugin = require('webpack-dashboard/plugin');
const configBase = require('./webpack.config.base.js');
 
module.exports = WebpackMerge(configBase, {
    entry: {
        app: [
            'react-hot-loader/patch'
        ]
    },

    devtool: 'inline-source-map',
    
    devServer: {
        hot: true,
        inline: true,
        historyApiFallback: true,
        publicPath:  '/', // match the output `publicPath`
        contentBase: [__dirname + '/public', __dirname + '/dist', __dirname + '/node_modules'], // match the output path
        host: '127.0.0.1',
        port: 9091,
        stats: { 
            colors: true 
        },
        watchOptions: {
          ignored: /node_modules/,
        },
    },
 
    module: {
        rules: [
            {
                enforce: 'pre',
                test: /\.js$/,
                loader: 'source-map-loader',
                exclude: [
                    Path.resolve(__dirname, '../../node_modules/')
                ]
            },
            {
                enforce: 'pre',
                test: /\.tsx?$/,
                use: "source-map-loader",
                exclude: [
                    Path.resolve(__dirname, '../../node_modules/')
                ]
            },
            // {
            //     test: /\.tsx?$/,
            //     loaders: [
            //         'awesome-typescript-loader'
            //     ],
            //     exclude: [
            //         Path.resolve(__dirname, '../../node_modules/')
            //     ],
            //     include: [
            //         Path.resolve(__dirname, '../../src/')
            //     ]
            // },
            {
                test: /\.tsx?$/,
                exclude: [
                    Path.resolve(__dirname, '../../node_modules/')
                ],
                include: [
                    Path.resolve(__dirname, '../../src/')
                ],
                use: [
                    {
                        loader: 'react-hot-loader/webpack' 
                    },
                    {
                        loader: 'awesome-typescript-loader',
                        options: {
                            transpileOnly: true,
                            useTranspileModule: false,
                            sourceMap: true,
                        },
                    },
                ],
            },
        ]
    },
    plugins: [
        new WebpackDashboardPlugin(),
        new Webpack.HotModuleReplacementPlugin(),
        new Webpack.NamedModulesPlugin(),
        new Webpack.NoEmitOnErrorsPlugin(),
        new HtmlWebpackPlugin({
            template: Path.resolve(__dirname, '../../public/index.html')
        }),
        new Webpack.optimize.CommonsChunkPlugin({
            name: 'vendor',
            minChunks: Infinity,
            filename: 'vendor.js'
        }),
    ]
});