import { derived, readable, writable, type Readable } from 'svelte/store';

const freq = readable(1); // Hz

export const now: Readable<Date> = derived(freq, ($freq, set) => {
  const interval = setInterval(() => {
    set(new Date());
  }, 1000 / $freq);

  return () => {
    clearInterval(interval);
  };
});