From da5fa3571aa98f5022d1e536e650546d7b5dc7d6 Mon Sep 17 00:00:00 2001
From: Sherry Wong <potatowagon@fb.com>
Date: Thu, 19 Sep 2024 15:24:02 +0800
Subject: [PATCH] .

---
 packages/lexical/src/LexicalUtils.ts | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/packages/lexical/src/LexicalUtils.ts b/packages/lexical/src/LexicalUtils.ts
index d4b11303222..9d0ab510135 100644
--- a/packages/lexical/src/LexicalUtils.ts
+++ b/packages/lexical/src/LexicalUtils.ts
@@ -1686,6 +1686,17 @@ export function isHTMLElement(x: Node | EventTarget): x is HTMLElement {
   return x.nodeType === 1;
 }
 
+/**
+ * @param x - The element being testing
+ * @returns Returns true if x is a document fragment, false otherwise.
+ */
+export function isDocumentFragment(
+  x: Node | EventTarget,
+): x is DocumentFragment {
+  // @ts-ignore-next-line - strict check on nodeType here should filter out non-Element EventTarget implementors
+  return x.nodeType === 11;
+}
+
 /**
  *
  * @param node - the Dom Node to check