rollup.config.js

// Import rollup plugins
import html from "@web/rollup-plugin-html";
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";

export default {
  plugins: [
    // Entry point for application build; can specify a glob to build multiple
    // HTML files for non-SPA app
    html({
      input: "index.html",
    }),
    // Resolve bare module specifiers to relative paths
    resolve(),
    // Minify HTML template literals
    minifyHTML(),
    // Minify JS
    terser({
      ecma: 2021,
      module: true,
      warnings: true,
    }),
    // Print bundle summary
    summary(),
    // Optional: copy any static assets to build directory
    copy({
      patterns: ["src/img/**/*", "src/locales/**/*"],
    }),
  ],
  output: {
    dir: "dist",
  },
  preserveEntrySignatures: "strict",
};