webpack.common.js

const webpack = require('webpack');
const path = require('path');
const CleanWebpackPlugin = require('clean-webpack-plugin');
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const HtmlWebPackPlugin = require("html-webpack-plugin");

const PUBLIC_PATH = process.env.PUBLIC_PATH;

module.exports = {
  entry: {
    app: './src/index.tsx'
  },
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: '[name].bundle.[hash].js',
    publicPath: PUBLIC_PATH || '/',
  },
  resolve: {
    extensions: [".ts", ".tsx", ".js", ".jsx"],
    modules: [path.resolve(__dirname, 'src'), 'node_modules']
  },
  module: {
    rules: [
      {
        test: /\.(t|j)sx?$/,
        exclude: /node_modules/,
        use: {
          loader: "awesome-typescript-loader"
        }
      },
      {
        test: /\.(sa|sc|c)ss$/,
        use: [
          MiniCssExtractPlugin.loader,
          'css-loader',
          'postcss-loader',
          'sass-loader',
        ],
      },
    ]
  },
  plugins: [
    new webpack.DefinePlugin({
      'process.env': {
        PUBLIC_PATH: JSON.stringify(PUBLIC_PATH || '/'),
      },
    }),
    new CleanWebpackPlugin(['dist']),
    new MiniCssExtractPlugin({
      filename: '[name].[hash].css',
      chunkFilename: '[id].[hash].css',
    }),
    new HtmlWebPackPlugin({
      template: "./src/index.html",
      filename: "./index.html"
    }),
  ],
};