diff --git a/src/Dom/shadow.ts b/src/Dom/shadow.ts
index 2aa8b2dc..eaa44451 100644
--- a/src/Dom/shadow.ts
+++ b/src/Dom/shadow.ts
@@ -6,7 +6,7 @@ function getRoot(ele: Node) {
  * Check if is in shadowRoot
  */
 export function inShadow(ele: Node) {
-  return getRoot(ele) !== ele?.ownerDocument;
+  return getRoot(ele) instanceof ShadowRoot;
 }
 
 /**
diff --git a/tests/shadow.test.tsx b/tests/shadow.test.tsx
index 3c81ede7..ba4dab3c 100644
--- a/tests/shadow.test.tsx
+++ b/tests/shadow.test.tsx
@@ -19,5 +19,10 @@ describe('shadow', () => {
 
       expect(getShadowRoot(button)).toBeNull();
     });
+
+    it('should return null if dom is not appended', () => {
+      const button = document.createElement('button');
+      expect(getShadowRoot(button)).toBeNull();
+    });
   });
 });