<!DOCTYPE html>
<html>
<body>
<script src="../resources/js-test.js"></script>
<script>
  description("Tests that an observation is received when calling IntersectionObserver.observe() with a disconnected target.");
  jsTestIsAsync = true;

  let receivedObservations = false;
  onload = () => {
    let intersectionObserver = new IntersectionObserver((_observations) => {
      gc();
      observations = _observations;

      shouldBeFalse("receivedObservations");
      receivedObservations = true;

      shouldBe("observations.length", "1");
      shouldBeEqualToString("observations[0].target.tagName", "DIV");
      shouldBeFalse("observations[0].isIntersecting");
      shouldBe("observations[0].intersectionRatio", "0.0");
      shouldBe("observations[0].target.foo", "1");
      setTimeout(finishJSTest, 100);
    });
    let div = document.createElement('div');
    div.foo = 1;
    intersectionObserver.observe(div);
    div = null;
    gc();
    setTimeout(gc, 0);
  };
</script>
</body>
</html>