feat(svelte): add onlyRenderVisibleElements option

packages/svelte/src/lib/store/visible-nodes.ts

@@ -0,0 +1,16 @@
+import { derived } from 'svelte/store';
+import { getNodesInside } from '@xyflow/system';
+
+import type { Node } from '$lib/types';
+import type { SvelteFlowStoreState } from './types';
+
+export function getVisibleNodes(store: SvelteFlowStoreState) {
+  return derived(
+    [store.nodes, store.onlyRenderVisibleElements, store.width, store.height, store.transform],
+    ([nodes, onlyRenderVisibleElements, width, height, transform]) => {
+      return onlyRenderVisibleElements
+        ? getNodesInside<Node>(nodes, { x: 0, y: 0, width, height }, transform, true)
+        : nodes;
+    }
+  );
+}