svelte/packages/svelte/tests/runtime-runes/samples/svelte-element-element-null/main.svelte

<script>
	let div = $state(null);

	$effect(()=>{
		const to_add = document.createElement("div");
		to_add.innerHTML=`<b>children</b>`;
		div = to_add;
	})
</script>

<svelte:element this={div}>
	<p>children</p>
</svelte:element>