@magelight/vite-plugin

// vite.config.ts
import { defineConfig } from 'vite';
import react from '@vitejs/plugin-react';
import { magelight } from '@magelight/vite-plugin';

export default defineConfig({
  plugins: [react(), magelight({ entries: { config: 'index.html', hud: 'hud.html' } })],
});

vite build then writes views/config/index.html and views/hud/index.html, each with only the assets that page reaches, ready to be named from manifest.json ("path": "views/config/index.html").

What it sets for you: base: './' (file:// loading), es2022 output (Ultralight 1.4's WebKit 615; es2019 was the 1.3-era rule), no crossorigin on module tags (a null origin refuses CORS loads → blank page), no modulepreload polyfill, per-entry pruning (the rule SeverActions' build-ui.ps1 enforced by hand).

Options: entries, viewsDir (views), single (index), outDir (dist), keepDist.