Describe the bug

On Svelte 4 if i try to do something like this:

<script>
	let clientWidth;
</script>

<svelte:window bind:clientWidth />

It will throw the following error which is very descriptive:

'clientWidth' is not a valid binding on svelte:window — valid bindings are innerWidth, innerHeight, outerWidth, outerHeight, scrollX, scrollY, devicePixelRatio or online (5:15)

If I do the equivalent in Svelte 5:

<script>
	let clientWidth = $state();
</script>

<svelte:window bind:clientWidth />

It will throw the following error:

'Failed to execute 'observe' on 'ResizeObserver': parameter 1 is not of type 'Element'

Reproduction

Svelte 4: REPL
Svelte 5: REPL

Logs

Svelte 4: 
'clientWidth' is not a valid binding on <svelte:window>; — valid bindings are innerWidth, innerHeight, outerWidth, outerHeight, scrollX, scrollY, devicePixelRatio or online (5:15)

Svelte 5:
Failed to execute 'observe' on 'ResizeObserver': parameter 1 is not of type 'Element'. in App.svelte

System Info

Svelte 4 (REPL)
Svelte 5 (REPL)

Severity

annoyance