32 lines
1.3 KiB
HTML
32 lines
1.3 KiB
HTML
<!DOCTYPE html><!-- webkit-test-runner [ IntersectionObserverEnabled=true ] -->
|
|
<head>
|
|
<script src="../resources/testharness.js"></script>
|
|
<script src="../resources/testharnessreport.js"></script>
|
|
<body>
|
|
|
|
<div id="root" style="position:absolute">
|
|
<div id="target" style="width: 100px; height: 100px; background-color: green"></div>
|
|
</div>
|
|
|
|
<script>
|
|
var observer;
|
|
var root = document.getElementById('root');
|
|
var target = document.getElementById('target');
|
|
test(function() {
|
|
observer = new IntersectionObserver(function() {}, { root: document.getElementById('root') });;
|
|
assert_equals(observer.root, root);
|
|
observer.observe(target);
|
|
assert_equals(internals.numberOfIntersectionObservers(document), 1);
|
|
document.body.appendChild(target);
|
|
var newDoc = document.implementation.createHTMLDocument('New document');
|
|
newDoc.body.appendChild(root);
|
|
assert_equals(internals.numberOfIntersectionObservers(document), 0);
|
|
assert_equals(internals.numberOfIntersectionObservers(newDoc), 1);
|
|
document.body.appendChild(root);
|
|
assert_equals(internals.numberOfIntersectionObservers(document), 1);
|
|
assert_equals(internals.numberOfIntersectionObservers(newDoc), 0);
|
|
},"Document's active intersection observers get updated");
|
|
</script>
|
|
</body>
|
|
</html>
|