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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 01:47:29 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 01:47:29 +0000 |
| commit | 0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d (patch) | |
| tree | a31f07c9bcca9d56ce61e9a1ffd30ef350d513aa /testing/web-platform/tests/css/cssom/MutationObserver-style.html | |
| parent | Initial commit. (diff) | |
| download | firefox-esr-0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d.tar.xz firefox-esr-0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d.zip | |
Adding upstream version 115.8.0esr.upstream/115.8.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'testing/web-platform/tests/css/cssom/MutationObserver-style.html')
| -rw-r--r-- | testing/web-platform/tests/css/cssom/MutationObserver-style.html | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/testing/web-platform/tests/css/cssom/MutationObserver-style.html b/testing/web-platform/tests/css/cssom/MutationObserver-style.html new file mode 100644 index 0000000000..673822d11e --- /dev/null +++ b/testing/web-platform/tests/css/cssom/MutationObserver-style.html @@ -0,0 +1,43 @@ +<!doctype html> +<meta charset=utf-8> +<title>Observer notifications when updating styles</title> +<link rel="help" href="https://drafts.csswg.org/cssom/#dom-cssstyledeclaration-setproperty"> +<script src=/resources/testharness.js></script> +<script src=/resources/testharnessreport.js></script> +<body> +<script> + "use strict"; + + promise_test(async () => { + let called = 0; + const el = document.createElement("div"); + document.body.appendChild(el); + const m = new MutationObserver(() => { + called++; + }); + m.observe(el, { attributes: true }); + el.style.height = "100px"; + await Promise.resolve(); + assert_equals(called, 1, "times callback called"); + el.style.height = "100px"; + await Promise.resolve(); + assert_equals(called, 1, "times callback called"); + }, "Updating style property with the same value does not trigger an observation callback"); + + promise_test(async () => { + let called = 0; + const el = document.createElement("div"); + document.body.appendChild(el); + const m = new MutationObserver(() => { + called++; + }); + m.observe(el, { attributes: true }); + el.style.cssText = "height:100px"; + await Promise.resolve(); + assert_equals(called, 1, "times callback called"); + el.style.cssText = "height:100px"; + await Promise.resolve(); + assert_equals(called, 2, "times callback called"); + }, "Updating cssText triggers an observation callback even if the value is the same"); +</script> + |