fix: Check for classList existence before use (#540)

Closes #537
ariakit · Feb 5, 2020 · 92a5fa1 · 92a5fa1
1 parent 8366f6e
commit 92a5fa1
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/packages/reakit/src/Dialog/__utils/useFocusTrap.ts b/packages/reakit/src/Dialog/__utils/useFocusTrap.ts
@@ -24,7 +24,7 @@ function hasNestedOpenModals(
 const focusTrapClassName = "__reakit-focus-trap";
 
 export function isFocusTrap(element: Element) {
-  return element.classList.contains(focusTrapClassName);
+  return element.classList?.contains(focusTrapClassName);
 }
 
 export function useFocusTrap(