The "Build with Rollup" documentation is broken

[tournesolo]

Which package(s) are affected?

Lit Core (lit / lit-html / lit-element / reactive-element)

Description

Trying to follow the instructions for building-with-rollup triggers multiple errors:

1. "While loading the Rollup configuration from "rollup.config.js", Node tried to require an ES module from a CommonJS file"
   Solution: Rename rollup.config.js to rollup.config.mjs

2. "The requested module '@web/rollup-plugin-html' does not provide an export named 'default'"
   Solution:
   import { rollupPluginHTML as html } from "@web/rollup-plugin-html";

3. The requested module '@rollup/plugin-terser' does not provide an export named 'terser'
   Solution:
   import terser from '@rollup/plugin-terser';

4. TypeError: minifyHTML is not a function
   Solution:
   import pkgMinifyHTML from 'rollup-plugin-minify-html-literals';
const minifyHTML = pkgMinifyHTML.default

Reproduction

Follow the instructions at building-with-rollup

Workaround

See above

Is this a regression?

No or unsure. This never worked, or I haven't tried before.

Affected versions

2.x

Browser/OS/Node environment

node v20.11.0
npm 10.2.4

[augustjk]

Thank you for the report! Transferred issue to the lit.dev repo as this is a documentation issue.