mosaic-widgets/rollup.config.mjs

// Import rollup plugins
import { rollupPluginHTML as html } from "@web/rollup-plugin-html";
import {copy} from '@web/rollup-plugin-copy';
import resolve from '@rollup/plugin-node-resolve';
import * as terser from '@rollup/plugin-terser';
import * as minifyHTML from 'rollup-plugin-minify-html-literals';
import summary from 'rollup-plugin-summary';

export default {
  plugins: [
    // Entry point for application build; can specify a glob to build multiple
    // HTML files for non-SPA app
    html({
      input: 'dist/**.html',
    }),
    // Resolve bare module specifiers to relative paths
    resolve(),
    // Print bundle summary
    summary(),
    // Optional: copy any static assets to build directory
    copy({
      patterns: ['images/**/*', 'css/**/*.css'],
    }),
  ],
  output: {
    dir: 'build',
  },
  experimentalCodeSplitting: true,
  preserveEntrySignatures: 'strict',
};