Bug 1671656: Remove intersection observer after calling finish(). r=nika

Differential Revision: https://phabricator.services.mozilla.com/D109386
dothq · Mar 22, 2021 · 8fcbfe7 · 8fcbfe7
1 parent ed88fc8
commit 8fcbfe7
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/dom/base/test/test_bug1399605.html b/dom/base/test/test_bug1399605.html
@@ -18,6 +18,7 @@
   let observer = new IntersectionObserver(function() {
     ok(true, "we are still observing");
     SimpleTest.finish();
+    observer.unobserve(document.getElementById('target'));
   });
   observer.observe(document.getElementById('target'));
   observer.unobserve(document.getElementById('content'));