useMutationObserver

		<script lang="ts">
	import { useMutationObserver } from "runed";
 
	let el = $state<HTMLElement | null>(null);
	const messages = $state<string[]>([]);
	let className = $state("");
	let style = $state("");
 
	useMutationObserver(
		() => el,
		(mutations) => {
			const mutation = mutations[0];
			if (!mutation) return;
 
			messages.push(mutation.attributeName!);
		},
		{ attributes: true }
	);
 
	setTimeout(() => {
		className = "text-brand";
	}, 1000);
 
	setTimeout(() => {
		style = "font-style: italic;";
	}, 1500);
</script>
 
<div bind:this={el} class={className} {style}>
	{#each messages as text}
		<div>
			Mutation Attribute: {text}
		</div>
	{:else}
		<div>No mutations yet</div>
	{/each}
</div>
	

		const { stop } = useMutationObserver(/* ... */);
stop();