webpack.config.js

/*
|--------------------------------------------------------------------------
| webpack.config.js -- Configuration for Webpack
|--------------------------------------------------------------------------
|
| Webpack turns all the clientside HTML, CSS, Javascript into one bundle.js file.
| This is done for performance reasons, as well as for compatability reasons.
|
| You do not have to worry about this file, except for proxy section below.
| All proxies does is route traffic from the hotloader to the backend.
| You must define explicity all routes here, as we do for the /api/* routes.
|
| The rest of this file tell webpack which types of files to bundle (in the rules).
| In addition, it also uses babel to transpile your javascript into code all browsers can use.
| see https://babeljs.io/docs/en/ if this interests you!
|
*/

const path = require('path');

const entryFile = path.resolve(__dirname, 'client', 'src', 'index.jsx');
const outputDir = path.resolve(__dirname, 'client', 'dist');

const webpack = require('webpack');

module.exports = (env) => ({
  entry: ['@babel/polyfill', entryFile],
  output: {
    path: outputDir,
    publicPath: '/',
    filename: 'bundle.js',
  },
  // This lets you use React Dev Tools
  // mode: 'development',
  // devtool: 'source-map',
  devtool: 'inline-source-map',
  module: {
    rules: [
      {
        test: /\.(js|jsx)$/,
        loader: 'babel-loader',
        options: {
          envName: env.ENV,
        },
        exclude: /node_modules/,
      },
      {
        test: /\.(scss|css)$/,
        use: [
          {
            loader: 'style-loader',
          },
          {
            loader: 'css-loader',
          },
        ],
      },
      {
        test: /\.(png|svg|jpg|gif)$/,
        use: [
          {
            loader: 'url-loader',
          },
        ],
      },
    ],
  },
  resolve: {
    extensions: ['*', '.js', '.jsx'],
  },
  plugins: [new webpack.HotModuleReplacementPlugin()],
  devServer: {
    historyApiFallback: {
      disableDotRule: true,
    },
    static: './client/dist',
    hot: true,
    proxy: {
      '/api': 'http://localhost:3000',
      '/socket.io/*': {
        target: 'http://localhost:3000',
        ws: true,
      },
    },
  },
});