webpack.prod.js

const { DefinePlugin } = require("webpack");
const HtmlWebpackPlugin = require("html-webpack-plugin");
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const common = require('./webpack.common')
const {merge} = require('webpack-merge')

module.exports = merge(common, {
  mode: "production",
  entry: "./src/main/index.tsx",
  module: {
    rules: [
      {
        test: /\.ts(x?)$/,
        loader: "ts-loader",
        exclude: /\node_modules/,
      },
      {
        test: /\.scss$/,
        use: [
          {
            loader: MiniCssExtractPlugin.loader,
          },
          {
            loader: "css-loader",
            options: {
              modules: true,
            },
          },
          {
            loader: "sass-loader",
          },
        ],
      },
    ],
  },
  externals: {
    react: "React",
    "react-dom": "ReactDOM",
  },
  plugins: [
    new DefinePlugin({
      "process.env.API_URL": JSON.stringify("http://fordev.herokuapp.com/api"),
    }),
    new HtmlWebpackPlugin({
      template: 'template.prod.html'
    }),
    new MiniCssExtractPlugin({
      filename: 'main-bundle-[fullhash].css'
    })
  ],
});