boardgame-phaser/packages/sample-game/src/main.tsx

import { h } from 'preact';
import { GameUI } from 'boardgame-phaser';
import './style.css';
import App from "@/ui/App";

const ui = new GameUI({
  container: document.getElementById('ui-root')!,
  root: <App/>,
});

ui.mount();