forked from mirrors/gecko-dev
2866d20a40
This commit adds two tests around anchor selection. The first tests that 'position: sticky' is an invalid subtree, which is new to the spec. The second tests that implementations respect 'overflow-anchor' on the table element, and don't get confused with the boxes generated by tables. Differential Revision: https://phabricator.services.mozilla.com/D16274 --HG-- extra : rebase_source : 3c2e74a5765d3409a57aa892fe20aa208c5c0e84 extra : intermediate-source : 55addc12904b79f7300e47da96b1d33780a4cbfb extra : source : 306393539feb1a3391c3a03baaee43e7058bc44a
47 lines
1.2 KiB
HTML
47 lines
1.2 KiB
HTML
<!DOCTYPE html>
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<meta charset="utf-8">
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<link rel="help" href="https://drafts.csswg.org/css-scroll-anchoring-1/">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<style>
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#scroller {
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height: 200px;
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overflow: scroll;
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}
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#before { height: 50px; }
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#table-row {
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display: table-row;
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overflow-anchor: none;
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width: 100px;
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height: 100px;
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}
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#after { margin-bottom: 500px; }
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</style>
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<div id="scroller">
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<div id="before"></div>
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<div id="table-row">content</div>
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<div id="after"></div>
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</div>
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<script>
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// Tests that the anchor exclusion API works with table parts that generate
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// anonymous table box wrappers
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test(() => {
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let scroller = document.querySelector('#scroller');
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let before = document.querySelector('#before');
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// Scroll down so that #table-row is the only element in view
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scroller.scrollTop = 50;
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// Expand #before so that we might perform a scroll adjustment
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before.style.height = "100px";
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// We shouldn't have selected #table-row as an anchor as it is
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// 'overflow-anchor: none'
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assert_equals(scroller.scrollTop, 50);
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}, "A table with anonymous wrappers and 'overflow-anchor: none' shouldn't generate any scroll anchor candidates.");
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</script>
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