fix: use isElement util for unobserve

juggle · Mar 4, 2020 · 3a99b98 · 3a99b98
1 parent 8a86818
commit 3a99b98
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/ResizeObserver.ts b/src/ResizeObserver.ts
@@ -32,7 +32,7 @@ class ResizeObserver {
     if (arguments.length === 0) {
       throw new TypeError(`Failed to execute 'unobserve' on 'ResizeObserver': 1 argument required, but only 0 present.`)
     }
-    if (target instanceof Element === false) {
+    if (!isElement(target)) {
       throw new TypeError(`Failed to execute 'unobserve' on 'ResizeObserver': parameter 1 is not of type 'Element`);
     }
     ResizeObserverController.unobserve(this, target);