| <!doctype HTML> |
| <html> |
| <meta charset="utf8"> |
| <title>Content Visibility: ContentVisibilityAutoStateChange event.</title> |
| <link rel="author" title="Vladimir Levin" href="mailto:vmpstr@chromium.org"> |
| <link rel="help" href="https://drafts.csswg.org/css-contain/#content-visibility"> |
| <meta name="assert" content="ContentVisibilityAutoStateChange does not fire on disconnected element"> |
| |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| |
| <style> |
| .spacer { |
| height: 10000px; |
| } |
| #bottomdiv { |
| content-visibility: auto; |
| } |
| </style> |
| |
| <div class=spacer></div> |
| <div id=bottomdiv></div> |
| |
| <script> |
| promise_test(t => new Promise(async (resolve, reject) => { |
| await new Promise((waited, _) => { |
| requestAnimationFrame(() => requestAnimationFrame(waited)); |
| }); |
| |
| let observed = false; |
| bottomdiv.addEventListener("contentvisibilityautostatechange", () => { |
| reject("unexpected signal") |
| }); |
| |
| bottomdiv.remove() |
| requestAnimationFrame(() => requestAnimationFrame(resolve)); |
| |
| }), "ContentVisibilityAutoStateChange does not fire on disconnected element"); |
| |
| </script> |
| |
