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Diffstat (limited to 'testing/web-platform/tests/css/css-contain/content-visibility/content-visibility-with-top-layer-006.html')
-rw-r--r-- | testing/web-platform/tests/css/css-contain/content-visibility/content-visibility-with-top-layer-006.html | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/testing/web-platform/tests/css/css-contain/content-visibility/content-visibility-with-top-layer-006.html b/testing/web-platform/tests/css/css-contain/content-visibility/content-visibility-with-top-layer-006.html new file mode 100644 index 0000000000..79a7993e26 --- /dev/null +++ b/testing/web-platform/tests/css/css-contain/content-visibility/content-visibility-with-top-layer-006.html @@ -0,0 +1,45 @@ +<!doctype html> +<meta charset="utf8"> +<title>CSS Content Visibility: offscreen c-v auto content is relevant when in top layer</title> +<link rel="author" title="Martin Robinson" href="mailto:mrobinson@igalia.com"> +<link rel="help" href="https://drafts.csswg.org/css-contain/#content-visibility"> +<meta name="assert" content="offscreen c-v auto content is relevant when in top layer"> + +<script src="/resources/testharness.js"></script> +<script src="/resources/testharnessreport.js"></script> +<script src="/common/rendering-utils.js"></script> + +<style> +#inner { + content-visibility: auto; + contain-intrinsic-size: 100px 100px; +} +</style> + +<dialog id="dialog"> + <div id="spacer" style="height: 100000px;"></div> + <div id="inner"> + <div style="height: 200px; width: 200px;">content</div> + </div> +</dialog> + +<script> +promise_test(async () => { + dialog.show(); + // It takes at least one frame to determine the proximity to the viewport. + await waitForAtLeastOneFrame(); + assert_equals(inner.getBoundingClientRect().height, 100); + + dialog.close(); + dialog.showModal(); + + // Even though the element with `content-visibility: auto` has an ancestor + // in the top layer, this element is not in the top layer list (although + // it's in the top layer stacking context). This means it should not be + // relevant to the user, because it is nevertheless not onscreen. + // It takes at least one frame to determine the proximity to the viewport. + await waitForAtLeastOneFrame(); + assert_equals(inner.getBoundingClientRect().height, 100); + dialog.close(); +}); +</script> |