childnode array check

anarock · Aug 29, 2018 · 1fab258 · 1fab258
1 parent a670412
commit 1fab258
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/src/components/shared/OptionGroup.tsx b/src/components/shared/OptionGroup.tsx
@@ -86,7 +86,11 @@ class OptionGroup extends React.PureComponent<
       }
     );
 
-    if (this.optionRef.current && this.optionRef.current.childNodes) {
+    if (
+      this.optionRef.current &&
+      this.optionRef.current.childNodes &&
+      this.optionRef.current.childNodes.length
+    ) {
       this.observer.observe(this.optionRef.current.childNodes[0] as Element);
     }
   }