webpack.config.js

const HtmlWebpackPlugin = require("html-webpack-plugin");
const CopyPlugin = require("copy-webpack-plugin");
const TerserPlugin = require("terser-webpack-plugin");
const path = require("path");
const webpack = require("webpack");
const public = path.join(__dirname, "wallet_ui", "public");

const dist = path.join(__dirname, "dist");

module.exports = {
  entry: {
    index: path.join(__dirname, "wallet_ui/index.tsx"),
  },
  output: {
    filename: "[name].js",
    path: dist,
  },
  mode: "production",
  module: {
    rules: [
      { test: /\.tsx?$/, loader: "ts-loader" },
      {
        exclude: /node_modules/,
        test: /\.css$/,
        use: [
          {
            loader: "style-loader",
          },
          {
            loader: "css-loader",
          },
        ],
      },
      {
        test: /\.s[ac]ss$/i,
        use: [
          // Creates `style` nodes from JS strings
          "style-loader",
          // Translates CSS into CommonJS
          "css-loader",
          // Compiles Sass to CSS
          "sass-loader",
        ],
      },
    ],
  },
  optimization: {
    minimize: true,
    minimizer: [
      new TerserPlugin({
        test: /\.[tj]s(\?.*)?$/i,
        terserOptions: {
          format: {
            comments: false,
          },
        },
      }),
    ],
    splitChunks: {
      chunks: "async",
      minSize: 20000,
      minRemainingSize: 0,
      maxSize: 250000,
      minChunks: 1,
      maxAsyncRequests: 30,
      maxInitialRequests: 30,
      enforceSizeThreshold: 50000,
      cacheGroups: {
        defaultVendors: {
          test: /[\\/]node_modules[\\/]/,
          priority: -10,
          reuseExistingChunk: true,
        },
        default: {
          reuseExistingChunk: true,
          minChunks: 2,
          priority: -20,
        },
      },
    },
  },
  resolve: {
    extensions: [".js", ".ts", ".jsx", ".tsx"],
    fallback: {
      assert: require.resolve("assert/"),
      buffer: require.resolve("buffer/"),
      events: require.resolve("events/"),
      stream: require.resolve("stream-browserify/"),
      util: require.resolve("util/"),
    },
  },
  plugins: [
    new webpack.ProvidePlugin({
      Buffer: [require.resolve("buffer/"), "Buffer"],
      process: require.resolve("process/browser"),
    }),
    new CopyPlugin({
      patterns: [{ from: public, to: path.join(__dirname, "dist") }],
    }),
    new HtmlWebpackPlugin({
      template: "./wallet_ui/index.html",
      filename: "index.html",
      chunks: ["index"],
    }),
  ],
};