rudeshark.net/packages/client/src/scripts/use-interval.ts

import { onMounted, onUnmounted } from "vue";

export function useInterval(
	fn: () => void,
	interval: number,
	options: {
		immediate: boolean;
		afterMounted: boolean;
	},
): void {
	if (Number.isNaN(interval)) return;

	let intervalId: number | null = null;

	if (options.afterMounted) {
		onMounted(() => {
			if (options.immediate) fn();
			intervalId = window.setInterval(fn, interval);
		});
	} else {
		if (options.immediate) fn();
		intervalId = window.setInterval(fn, interval);
	}

	onUnmounted(() => {
		if (intervalId) window.clearInterval(intervalId);
	});
}