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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
| commit | 6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch) | |
| tree | a68f146d7fa01f0134297619fbe7e33db084e0aa /testing/web-platform/tests/css/css-will-change/will-change-fixpos-cb-position-1.html | |
| parent | Initial commit. (diff) | |
| download | thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.tar.xz thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.zip | |
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'testing/web-platform/tests/css/css-will-change/will-change-fixpos-cb-position-1.html')
| -rw-r--r-- | testing/web-platform/tests/css/css-will-change/will-change-fixpos-cb-position-1.html | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/testing/web-platform/tests/css/css-will-change/will-change-fixpos-cb-position-1.html b/testing/web-platform/tests/css/css-will-change/will-change-fixpos-cb-position-1.html new file mode 100644 index 0000000000..7e52ab4b03 --- /dev/null +++ b/testing/web-platform/tests/css/css-will-change/will-change-fixpos-cb-position-1.html @@ -0,0 +1,24 @@ +<!DOCTYPE html> +<meta charset="utf-8"> +<title>CSS will-change: 'will-change: position' does not create a containing block for fixed positioned elements but does create a containing block for absolutely positioned elements</title> +<link rel="author" title="L. David Baron" href="https://dbaron.org/"> +<link rel="author" title="Mozilla" href="http://www.mozilla.org/"> +<link rel="help" href="https://drafts.csswg.org/css-will-change-1/#will-change"> +<link rel="match" href="green-square-100-by-100-offset-ref.html"> +<meta name="assert" content="If any non-initial value of a property would cause the element to generate a containing block for fixed-position elements, specifying that property in will-change must cause the element to generate a containing block for fixed-position elements."> +<style> +html, body { margin: 0; padding: 0; } +div { width: 100px; height: 100px } +#wc { will-change: position; margin: 100px 0 0 100px; background: red } +.child { width: 50px; background: green } +#fixpos { position: fixed; top: 100px; left: 100px } +#abspos { position: absolute; top: 0; left: 50px } +</style> +<body> + <div id="wc"> + <div class="child" id="fixpos"> + </div> + <div class="child" id="abspos"> + </div> + </div> +</body> |