webpack.config.js

const path = require('path');
const HtmlWebPackPlugin = require("html-webpack-plugin");
const webpack = require('webpack');

const isDevelopment = process.env.NODE_ENV !== 'production';

module.exports = {
  mode: isDevelopment ? 'development' : 'production',
  devtool: isDevelopment ? 'eval-source-map' : 'source-map',
  devServer: {
    static: path.resolve(__dirname, 'public'),
  },
  entry: path.resolve(__dirname, 'src', 'index.js'), 
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: 'bundle.js',
  },
  resolve: {
    extensions: ['.js', '.jsx'],
  },
  module: {
    rules: [
      {
        test: /\.(jsx|js)$/,
        exclude: /node_modules/,
        use: 'babel-loader',
      },
      {
        test: /\.scss$/,
        exclude: /node_modules/,
        use: ['style-loader', 'css-loader', 'sass-loader'],
      },
      {
        test: /\.svg$/,
        exclude: /node_modules/,
        loader: 'svg-url-loader'
      },
      {
        test: /\.(png|jpe?g|gif)$/i,
        exclude: /node_modules/,
        loader: 'file-loader'
      }
    ]
  },
  plugins: [
    new HtmlWebPackPlugin({
      template: path.resolve(__dirname, 'public', 'index.html'),
    }),
    new webpack.HotModuleReplacementPlugin(),
    new webpack.ProvidePlugin({
      'React': 'react'
    })
  ]
}