webpack.config.js

/* eslint-disable no-unused-vars */
const webpack = require('webpack');
const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');

module.exports = {
  mode: process.env.NODE_ENV,
  cache: false,
  entry: path.resolve(__dirname, 'client/index.js'),
  output: {
    path: path.resolve(__dirname, 'build'),
    filename: 'bundle.js',
    publicPath: '/',
    clean: true,
  },
  devtool: 'eval-source-map',
  devServer: {
    host: 'localhost',
    port: 8080,
    // watchFiles: {
    //   paths: ['client/**'],
    //   options: {
    //     usePolling: false,
    //   },
    // },
    static: {
      directory: path.resolve(__dirname, 'build'),
      publicPath: '/',
    },
    // enable HMR on the devServer
    hot: true,
    historyApiFallback: true,
    headers: { 'Access-Control-Allow-Origin': '*' },
    proxy: {
      '/**': {
        target: 'http://localhost:3000',
        secure: false,
      },
    },
  },
  module: {
    rules: [
      {
        test: /\.(js|jsx)$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['@babel/preset-env', '@babel/preset-react'],
            plugins: ['@babel/plugin-transform-runtime'],
          },
        },
      },
      {
        test: /\.s?css/,
        exclude: /node_modules/,
        use: ['style-loader', 'css-loader', 'postcss-loader'],
      },
      {
        test: /\.png/,
        exclude: /node_modules/,
        use: ['file-loader'],
      },
    ],
  },
  plugins: [
    // new HtmlWebpackPlugin({
    //   template: './client/index.html',
    //   publicPath: process.env.NODE_ENV === 'production' ? 'build' : 'auto',
    // }),
  ],
  resolve: {
    // Enable importing JS / JSX files without specifying their extension
    extensions: ['.js', '.jsx'],
  },
};