make updatenodeinternal node id optional

examples/svelte/src/routes/examples/useupdatenodeinternals/CustomNode.svelte

@@ -9,7 +9,7 @@
 
 	const onClick = () => {
 		handleCount += 1;
-		updateNodeInternals(id);
+		updateNodeInternals();
 	};
 </script>
 

packages/svelte/src/lib/hooks/useUpdateNodeInternals.svelte.ts

@@ -1,6 +1,5 @@
-import type { UpdateNodeInternals } from '@xyflow/system';
-
 import { useStore } from '$lib/store';
+import { getContext } from 'svelte';
 
 /**
  * Hook for updating node internals.
@@ -8,12 +7,16 @@ import { useStore } from '$lib/store';
  * @public
  * @returns function for updating node internals
  */
-export function useUpdateNodeInternals(): UpdateNodeInternals {
+export function useUpdateNodeInternals(): (nodeId?: string | string[]) => void {
   const { domNode, updateNodeInternals } = $derived(useStore());
+  const nodeId = getContext('svelteflow__node_id') as string | undefined;
 
   // @todo: do we want to add this to system?
-  const updateInternals = (id: string | string[]) => {
+  const updateInternals = (id?: string | string[]) => {
-    const updateIds = Array.isArray(id) ? id : [id];
+    if (!id && !nodeId) {
+      throw new Error('When using outside of a node, you must provide an id.');
+    }
+    const updateIds = id ? (Array.isArray(id) ? id : [id]) : [nodeId];
     const updates = new Map();
 
     updateIds.forEach((updateId) => {