webpack.config.js

const HtmlWebpackPlugin = require('html-webpack-plugin');
const HtmlInlineScriptPlugin = require('html-inline-script-webpack-plugin');
const path = require('path');

module.exports = (env, argv) => ({
  mode: argv.mode === 'production' ? 'production' : 'development',

  // This is necessary because Figma's 'eval' works differently than normal eval
  devtool: argv.mode === 'production' ? false : 'inline-source-map',

  entry: {
    ui: './src/app/index.tsx', // The entry point for your UI code
    code: './src/plugin/controller.ts', // The entry point for your plugin code
  },

  module: {
    rules: [
      // Converts TypeScript code to JavaScript
      { test: /\.tsx?$/, use: 'ts-loader', exclude: /node_modules/ },

      // Enables including CSS by doing "import './file.css'" in your TypeScript code
      {
        test: /\.css$/,
        use: ['style-loader', 'css-loader'],
      },

      // Use asset modules instead of url-loader for Webpack 5
      {
        test: /\.(png|jpg|gif|webp|svg)$/,
        type: 'asset',
        parser: {
          dataUrlCondition: {
            maxSize: 100 * 1024, // 100kb
          },
        },
      },
    ],
  },

  // Webpack tries these extensions for you if you omit the extension like "import './file'"
  resolve: {
    extensions: ['.tsx', '.ts', '.jsx', '.js'],
    // Add fallbacks for Node.js core modules if needed
    fallback: {
      path: false,
      fs: false,
    },
  },

  output: {
    filename: '[name].js',
    path: path.resolve(__dirname, 'dist'), // Compile into a folder called "dist"
    clean: true, // Replaces clean-webpack-plugin in Webpack 5
  },

  // Optimization settings for Webpack 5
  optimization: {
    splitChunks: {
      chunks: 'all',
      cacheGroups: {
        vendor: {
          test: /[\\/]node_modules[\\/]/,
          name: 'vendors',
          priority: 10,
        },
      },
    },
    moduleIds: 'deterministic', // For long-term caching
  },

  // Cache configuration for faster rebuilds
  cache: {
    type: 'filesystem',
    buildDependencies: {
      config: [__filename],
    },
  },

  // Performance hints
  performance: {
    hints: argv.mode === 'production' ? 'warning' : false,
    maxAssetSize: 512000,
    maxEntrypointSize: 512000,
  },

  // Development server configuration for Webpack 5
  devServer: {
    static: {
      directory: path.join(__dirname, 'dist'),
    },
    compress: true,
    port: 9000,
    hot: true,
    open: true,
  },

  // Tells Webpack to generate "ui.html" and to inline "ui.ts" into it
  plugins: [
    new HtmlWebpackPlugin({
      template: './src/app/index.html',
      filename: 'ui.html',
      chunks: ['ui'],
      inject: 'body',
      scriptLoading: 'defer',
    }),
    new HtmlInlineScriptPlugin(),
  ],
});