| <!DOCTYPE html><!-- webkit-test-runner [ IntersectionObserverEnabled=true ] --> |
| <head> |
| <script src="../resources/testharness.js"></script> |
| <script src="../resources/testharnessreport.js"></script> |
| <script src="../resources/gc.js"></script> |
| <body> |
| |
| <div id="target" style="width: 100px; height: 100px; background-color: green"></div> |
| |
| <script> |
| function observerShouldBeRemoved() |
| { |
| return new Promise(function(resolve) { |
| function testIfRemoved() { |
| gc(); |
| if (internals && internals.numberOfIntersectionObservers(document) == 0) |
| resolve(); |
| else |
| requestAnimationFrame(testIfRemoved); |
| } |
| |
| testIfRemoved(); |
| }); |
| } |
| |
| async_test(function(t) { |
| let observer = new IntersectionObserver(function(entries) { |
| if (entries[0].isIntersecting) { |
| entries[0].target.remove(); |
| observerShouldBeRemoved().then(function() { |
| t.done(); |
| }); |
| } |
| }); |
| observer.observe(document.getElementById("target")); |
| assert_equals(internals.numberOfIntersectionObservers(document), 1); |
| }, "IntersectionObserver doesn't keep unreachable target alive"); |
| </script> |
| </body> |
| </html> |
