<!DOCTYPE html>
<script src="../resources/gc.js"></script>
<script src="../resources/testharness.js"></script>
<script src="../resources/testharnessreport.js"></script>

<style>
#target {
  width: 100px;
  height: 100px;
  background-color: green;
}
</style>
<div id="target"></div>

<script>
var target = document.getElementById("target");

async_test(function(t) {
    new IntersectionObserver(function(changes) {
        t.done();
    }).observe(target);
}, "IntersectionObserver callback fires even when the observer and callback have no JS references");

gc();
</script>