rollup.config.js

// Import rollup plugins
import typescript from '@rollup/plugin-typescript';
import { copy } from '@web/rollup-plugin-copy';
import resolve from '@rollup/plugin-node-resolve';
import { terser } from 'rollup-plugin-terser';
import minifyHTML from 'rollup-plugin-minify-html-literals';
import summary from 'rollup-plugin-summary';
import babel from '@rollup/plugin-babel';

export default {
  input: 'src/bakrypt-launchpad.ts',
  plugins: [
    typescript(),
    // Entry point for application build; can specify a glob to build multiple
    // HTML files for non-SPA app
    // html({
    //   input: 'index-2.html',
    // }),
    // Resolve bare module specifiers to relative paths
    resolve(),
    // Minify HTML template literals
    minifyHTML(),
    // Minify JS
    terser({
      ecma: 2020,
      module: true,
      warnings: true,
    }),
    babel({
      babelHelpers: 'bundled',
      presets: [
        [
          require.resolve('@babel/preset-env'),
          {
            targets: [
              'last 3 Chrome major versions',
              'last 3 Firefox major versions',
              'last 3 Edge major versions',
              'last 3 Safari major versions',
            ],
            modules: false,
            bugfixes: true,
          },
        ],
      ],
      plugins: [
        [
          require.resolve('babel-plugin-template-html-minifier'),
          {
            modules: { lit: ['html', { name: 'css', encapsulation: 'style' }] },
            failOnError: false,
            strictCSS: true,
            htmlMinifier: {
              collapseWhitespace: true,
              conservativeCollapse: true,
              removeComments: true,
              caseSensitive: true,
              minifyCSS: true,
            },
          },
        ],
      ],
    }),
    // Print bundle summary
    summary(),
    // Optional: copy any static assets to build directory
    copy({
      patterns: ['images/**/*'],
    }),
  ],
  output: {
    dir: 'dist',
  },
  preserveEntrySignatures: 'strict',
};