import { _, component, invalidate, render } from "ivi";
import { h1 } from "ivi-html";

const Counter = component((c) => {
  let counter = 0;

  const ticker = useEffect(c, (interval) => {
    const id = setInterval(() => {
      counter++;
      invalidate(c);
    }, interval);
    return () => clearInterval(id);
  });

  return (interval) => (
    ticker(interval),

    div(_, _, `Counter: ${counter}`),
  );
});

render(
  Counter(1000),
  document.getElementById("app"),
);