| <!DOCTYPE html><!-- webkit-test-runner [ enableIntersectionObserver=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> |
| function observerShouldBeRemoved() |
| { |
| return new Promise(function(resolve) { |
| handle = setInterval(function() { |
| GCController.collect(); |
| if (internals && internals.numberOfIntersectionObservers(document) == 0) { |
| clearInterval(handle); |
| resolve(); |
| } |
| }, 10); |
| }); |
| } |
| |
| async_test(function(t) { |
| var root = document.getElementById('root'); |
| var observer = new IntersectionObserver(function() {}, { root: document.getElementById('root') });; |
| var target = document.getElementById('target'); |
| assert_equals(observer.root, root, 'Observer starts out with non-null root'); |
| observer.observe(target); |
| assert_equals(internals.numberOfIntersectionObservers(document), 1); |
| root.parentNode.removeChild(root); |
| root = null; |
| target = null; |
| requestAnimationFrame(function() { |
| observer.takeRecords(); |
| observerShouldBeRemoved().then(t.step_func_done(function() { |
| assert_equals(observer.root, null, 'Observer has null root after root element is destroyed'); |
| })); |
| }); |
| }, "IntersectionObserver doesn't keep unreachable root alive"); |
| </script> |
| </body> |
| </html> |
