diff options
| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:22:09 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:22:09 +0000 |
| commit | 43a97878ce14b72f0981164f87f2e35e14151312 (patch) | |
| tree | 620249daf56c0258faa40cbdcf9cfba06de2a846 /testing/web-platform/tests/element-timing/disconnect-image.html | |
| parent | Initial commit. (diff) | |
| download | firefox-upstream.tar.xz firefox-upstream.zip | |
Adding upstream version 110.0.1.upstream/110.0.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
| -rw-r--r-- | testing/web-platform/tests/element-timing/disconnect-image.html | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/testing/web-platform/tests/element-timing/disconnect-image.html b/testing/web-platform/tests/element-timing/disconnect-image.html new file mode 100644 index 0000000000..6f9f2ce7b9 --- /dev/null +++ b/testing/web-platform/tests/element-timing/disconnect-image.html @@ -0,0 +1,41 @@ +<!DOCTYPE HTML> +<meta charset=utf-8> +<title>Element Timing: element attribute returns null when element is disconnected</title> +<body> +<script src="/resources/testharness.js"></script> +<script src="/resources/testharnessreport.js"></script> +<script src="resources/element-timing-helpers.js"></script> +<script> + let beforeRender; + let img; + async_test(function (t) { + assert_implements(window.PerformanceElementTiming, "PerformanceElementTiming is not implemented"); + const observer = new PerformanceObserver( + t.step_func_done(function(entryList) { + assert_equals(entryList.getEntries().length, 1); + const entry = entryList.getEntries()[0]; + const pathname = window.location.origin + '/element-timing/resources/square100.png'; + // This method will check that entry.element is |img|. + checkElement(entry, pathname, 'my_image', 'my_id', beforeRender, img); + + img.parentNode.removeChild(img); + // After removing image, entry.element should return null. + assert_equals(entry.element, null); + }) + ); + observer.observe({entryTypes: ['element']}); + // We add the image during onload to be sure that the observer is registered + // in time for it to observe the element timing. + window.onload = () => { + // Add image of width equal to 100 and height equal to 100. + img = document.createElement('img'); + img.src = 'resources/square100.png'; + img.setAttribute('elementtiming', 'my_image'); + img.setAttribute('id', 'my_id'); + document.body.appendChild(img); + beforeRender = performance.now(); + }; + }, 'Disconnected elements have null as their |element| attribute.'); +</script> + +</body> |