webpack.common.js

const webpack = require("webpack");
const path = require("path");
const CopyPlugin = require("copy-webpack-plugin");
const HtmlPlugin = require("html-webpack-plugin");
const { CleanWebpackPlugin } = require("clean-webpack-plugin");
const Dotenv = require("dotenv-webpack");

module.exports = {
  entry: {
    popup: path.resolve("src/popup/popup.tsx"),
    options: path.resolve("src/options/options.tsx"),
    background: path.resolve("src/background/background.ts"),
    contentScript: path.resolve("src/contentScript/contentScript.ts"),
  },
  module: {
    rules: [
      {
        test: /\.tsx?$/,
        use: "ts-loader",
        exclude: /node_modules/,
      },
      {
        test: /\.css$/i,
        use: ["style-loader", "css-loader"],
      },
      {
        test: /\.(jpg|jpeg|png|woff|woff2|eot|ttf|svg)$/,
        type: "asset/resource",
      },
    ],
  },
  resolve: {
    extensions: [".tsx", ".ts", ".js"],
    fallback: {
      stream: require.resolve("stream-browserify"),
      crypto: require.resolve("crypto-browserify"),
      http: require.resolve("stream-http"),
      https: require.resolve("https-browserify"),
      os: require.resolve("os-browserify/browser"),
    },
  },
  plugins: [
    new webpack.ProvidePlugin({
      process: "process/browser",
    }),
    new webpack.ProvidePlugin({
      Buffer: ["buffer", "Buffer"],
    }),
    new CleanWebpackPlugin({
      cleanStaleWebpackAssets: false,
    }),
    new CopyPlugin({
      patterns: [
        {
          from: path.resolve("src/static"),
          to: path.resolve("dist"),
        },
      ],
    }),
    ...getHtmlPlugins(["popup", "options"]),
    new Dotenv({
      path: "./.env", // load this now instead of the ones in '.env'
      safe: true, // load '.env.example' to verify the '.env' variables are all set. Can also be a string to a different file.
      allowEmptyValues: true, // allow empty variables (e.g. `FOO=`) (treat it as empty string, rather than missing)
      systemvars: true, // load all the predefined 'process.env' variables which will trump anything local per dotenv specs.
      silent: true, // hide any errors
      defaults: false, // load '.env.defaults' as the default values if empty.
    }),
  ],
  output: {
    filename: "[name].js",
    path: path.resolve("dist"),
  },
  performance: {
    hints: false,
  },
  optimization: {
    splitChunks: {
      chunks(chunk) {
        return chunk.name !== "contentScript" && chunk.name !== "background";
      },
    },
  },
};

function getHtmlPlugins(chunks) {
  return chunks.map(
    (chunk) =>
      new HtmlPlugin({
        title: "React Extension",
        filename: `${chunk}.html`,
        chunks: [chunk],
      })
  );
}