webpack.config.js

require("dotenv").config();
const path = require("path");
const webpack = require("webpack");
const HtmlWebpackPlugin = require("html-webpack-plugin");
const TerserPlugin = require("terser-webpack-plugin");
const CopyPlugin = require("copy-webpack-plugin");
const MiniCssExtractPlugin = require("mini-css-extract-plugin");

const isDevelopment = process.env.NODE_ENV !== "production";

const frontendDirectory = "frontend";

const frontend_entry = path.join("src", frontendDirectory, "src", "index.html");
const home_page= path.join("src", frontendDirectory, "src", "home.html");

module.exports = {
  target: "web",
  mode: isDevelopment ? "development" : "production",
  entry: {
    // The frontend.entrypoint points to the HTML file for this build, so we need
  
    index: path.join(__dirname, "src", frontendDirectory, "src", "index.js"),
  ocr: path.join(__dirname, "src", frontendDirectory, "src", "Ocr", "ocr.js")
  },
  devtool: isDevelopment ? "source-map" : false,
  optimization: {
    minimize: !isDevelopment,
    minimizer: [new TerserPlugin()],
    runtimeChunk: 'single',
    splitChunks: {
      chunks: 'all',
      name: false,
    },
  },
  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/"),
    },
  },
  output: {
    filename: '[name].bundle.js',
    path: path.join(__dirname, "dist", frontendDirectory),
  },

  // Depending in the language or framework you are using for
  // front-end development, add module loaders to the default
  // webpack configuration. For example, if you are using React
  // modules and CSS as described in the "Adding a stylesheet"
  // tutorial, uncomment the following lines:
  module: {
    rules: [
      {
        test: /\.css$/,
        use: [
          isDevelopment ? 'style-loader' : MiniCssExtractPlugin.loader,
    'css-loader',
    'postcss-loader', // Add the PostCSS loader
        ],
      },
      {
        test: /\.worker\.js$/,
        use: { loader: 'worker-loader' }
      }
    ],
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: path.join(__dirname, frontend_entry),
      filename: 'index.html',
      chunks: ['index'],

      minify: {
        removeComments: true,
        collapseWhitespace: true,
        removeAttributeQuotes: true,
        conservativeCollapse: true,
      },
      cache: false,
    }),  
    new HtmlWebpackPlugin({
      template: path.join(__dirname, "src", frontendDirectory, "src","Ocr", "ocr.html"),
      filename: 'ocr.html',
      chunks: ['ocr'],
      minify: {
        removeComments: true,
        collapseWhitespace: true,
        removeAttributeQuotes: true,
        conservativeCollapse: true,
      },
      cache: false,
    }),  
    new MiniCssExtractPlugin({
      filename: "./src/frontend/src/styles.css",
      // path: path.join(__dirname,'src',frontendDirectory,'src'),
    }),
    new webpack.EnvironmentPlugin([
      ...Object.keys(process.env).filter((key) => {
        if (key.includes("CANISTER")) return true;
        if (key.includes("DFX")) return true;
        return false;
      }),
    ]),
    new webpack.ProvidePlugin({
      Buffer: [require.resolve("buffer/"), "Buffer"],
      process: require.resolve("process/browser"),
    }),
    new CopyPlugin({
      patterns: [
        {
          from: `src/${frontendDirectory}/src/.ic-assets.json*`,
          to: ".ic-assets.json5",
          noErrorOnMissing: true,
        },
      ],
    }),
  ],
  // proxy /api to port 4943 during development.
  // if you edit dfx.json to define a project-specific local network, change the port to match.
  devServer: {
    proxy: {
      "/api": {
        target: "http://127.0.0.1:4943",
        changeOrigin: true,
        pathRewrite: {
          "^/api": "/api",
        },
      },
    },
    static: path.resolve(__dirname, "src", frontendDirectory, "assets"),
    hot: true,
    watchFiles: [path.resolve(__dirname, "src", frontendDirectory), path.resolve(__dirname, "src", frontendDirectory, 'src',"**/*.css")] ,// Ensure CSS files are watched 
    liveReload: true,
  },
};