Fresh – Next-gen web framework(fresh.deno.dev)

  const App = () => {
    // Client-side counter
    const [count, setCount] = useState(0);
    useEffect(() => {
      setTimeout(
        () => {setCount(count+1)},
        1000
      );
    }, [count, setCount]);

    // HTML-rendering part
    return (
      <div>Count: {count}</div>
    );
  }

  document.addEventListener('ready', () => {
    const count = document.getElementById('count');
    let value = 0;
    setInterval(() => {
      count.innerText = value++;
    }, 1000);
  });