webpack.common.js

const path = require('path')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const CopyPlugin = require('copy-webpack-plugin')
const webpack = require('webpack')
const dotenv = require('dotenv')

// this will update the process.env with environment variables in .env file
dotenv.config()

module.exports = {
  entry: path.join(__dirname, 'src', 'index.tsx'),
  resolve: {
    extensions: ['.tsx', '.ts', '.js', '.jsx']
  },
  module: {
    rules: [
      {
        test: /\.(js|jsx)$/,
        exclude: /node_modules/,
        use: ['babel-loader']
      },
      {
        test: /\.(ts|tsx)$/,
        exclude: /node_modules/,
        use: [
          {
            loader: 'ts-loader',
            options: {
              compilerOptions: {
                noEmit: false
              }
            }
          }
        ]
      },
      {
        test: /\.css$/,
        exclude: ['/node_modules/'],
        use: ['style-loader', 'css-loader']
      },
      {
        test: /\.scss$/,
        exclude: ['/node_modules/'],
        use: ['style-loader', 'css-loader', 'sass-loader']
      },
      {
        test: /\.(jpg|jpeg|png|gif|mp3|svg)$/,
        use: ['file-loader']
      }
    ]
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: path.join(__dirname, 'src', 'index.html')
    }),
    new CopyPlugin({
      patterns: [{ from: 'public' }]
    }),
    new webpack.DefinePlugin({
      'process.env': JSON.stringify(process.env)
    })
  ]
}