webpack.config.js

const path = require('path')
const webpack = require('webpack')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const HtmlMinimizerPlugin = require('html-minimizer-webpack-plugin')

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: {
    code: './src/code.ts', // This is the entry point for our plugin code.
  },
  module: {
    rules: [
      // Converts TypeScript code to JavaScript
      {
        test: /\.tsx?$/,
        use: 'ts-loader',
        exclude: /node_modules/,
      },
      {
        test: /\.(png|jpg|gif|svg)$/i,
        type: 'asset/inline',
      },
      {
        test: /\.html$/,
        use: [
          {
            loader: 'html-loader',
            options: {
              minimize: {
                removeComments: true,
                collapseWhitespace: true,
                minifyCSS: true,
                minifyJS: true,
                removeRedundantAttributes: true,
                removeScriptTypeAttributes: true,
                removeStyleLinkTypeAttributes: true,
                useShortDoctype: true,
              },
            },
          },
        ],
      },
    ],
  },
  // Webpack tries these extensions for you if you omit the extension like "import './file'"
  resolve: {
    extensions: ['.ts', '.js'],
  },
  output: {
    filename: '[name].js',
    path: path.resolve(__dirname, 'dist'),
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: './src/ui.html',
      filename: 'ui.html',
      inject: false,
      minify: {
        removeComments: true,
        collapseWhitespace: true,
        removeRedundantAttributes: true,
        useShortDoctype: true,
        removeEmptyAttributes: true,
        removeStyleLinkTypeAttributes: true,
        keepClosingSlash: true,
        minifyJS: true,
        minifyCSS: true,
        minifyURLs: true,
      },
    }),
  ],
  optimization: {
    minimize: true,
    minimizer: [new HtmlMinimizerPlugin()],
  },
})