packages/core/src/Listbox/ListboxVirtualizer.vue (1)

85-91: ⚠️ Potential issue | 🟡 Minor

Add a safe fallback when .find() returns no matching child.

Line 86 can return undefined when Fragment children are all symbol-typed nodes, which will break cloneVNode on line 91. Add a fallback to guarantee a valid VNode is always selected.

Suggested fix

-import { cloneVNode, computed, Fragment, useSlots } from 'vue'
+import { cloneVNode, computed, Fragment, isVNode, useSlots } from 'vue'
@@
-  const targetNode = defaultNode.type === Fragment && Array.isArray(defaultNode.children)
-    ? defaultNode.children.find(child => typeof (child as VNode).type !== 'symbol') as VNode
-    : defaultNode
+  const targetNode = defaultNode.type === Fragment && Array.isArray(defaultNode.children)
+    ? (defaultNode.children.find(
+        child => isVNode(child) && typeof child.type !== 'symbol',
+      ) as VNode | undefined) ?? defaultNode
+    : defaultNode

Consider adding a regression test for a Fragment slot containing only filtered nodes before the actual option node.

🤖 Prompt for AI Agents

Verify each finding against the current code and only fix it if needed.

In `@packages/core/src/Listbox/ListboxVirtualizer.vue` around lines 85 - 91, The
targetNode resolution can be undefined when Fragment children are all
symbol-typed; update the logic that sets targetNode (based on defaultNode,
Fragment and .find) to use a safe fallback (e.g., fall back to defaultNode or a
minimal VNode) before calling cloneVNode, so cloneVNode always receives a valid
VNode; update the code path that declares targetNode and ensure
cloneVNode(targetNode, {...}) is guarded accordingly and add a regression test
that renders a Fragment slot containing only filtered (symbol) nodes to verify
the fallback behavior.