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Automatic update from web-platform-testsposition:sticky - add test for overflow:hidden ancestor Bug: 879428 Change-Id: If92ac26be1fbf71be3e4a6040b764a09bc460eac Reviewed-on: https://chromium-review.googlesource.com/1207190 Reviewed-by: Robert Flack <flackr@chromium.org> Commit-Queue: Stephen McGruer <smcgruer@chromium.org> Cr-Commit-Position: refs/heads/master@{#588918} -- wpt-commits: 29717275b4d723b1159f41b072df84a390034fd9 wpt-pr: 12851
86 lines
2.9 KiB
HTML
86 lines
2.9 KiB
HTML
<!DOCTYPE html>
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<title>position:sticky elements should respect an overflow:hidden ancestor</title>
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<link rel="help" href="https://www.w3.org/TR/css-position-3/#sticky-pos" />
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<meta name="assert" content="This test checks that position:sticky elements adhere to an overflow:hidden ancestor" />
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script src="resources/sticky-util.js"></script>
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<body></body>
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<script>
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test(() => {
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const outer_scroller = document.createElement('div');
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outer_scroller.style.width = '100px';
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outer_scroller.style.height = '100px';
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outer_scroller.style.overflow = 'scroll';
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const inner_scroller = document.createElement('div');
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inner_scroller.style.width = '80%';
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inner_scroller.style.height = '200px';
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inner_scroller.style.overflow = 'hidden';
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const sticky = document.createElement('div');
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sticky.style.width = '20px';
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sticky.style.height = '20px';
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sticky.style.position = 'sticky';
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sticky.style.top = '0';
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sticky.style.background = 'red';
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const spacer = document.createElement('div');
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spacer.style.height = '500px';
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inner_scroller.appendChild(sticky);
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inner_scroller.appendChild(spacer);
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outer_scroller.appendChild(inner_scroller);
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document.body.appendChild(outer_scroller);
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outer_scroller.scrollTop = 50;
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// The sticky should attach to the inner scroller, and so should not stick.
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assert_equals(sticky.offsetTop, inner_scroller.offsetTop);
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}, 'A sticky element should attach to an overflow:hidden ancestor');
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// This tests a specific bug in Firefox where the sticky element incorrectly
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// started sticking when inside a table. See https://bugzilla.mozilla.org/show_bug.cgi?id=1488810
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test(() => {
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const outer_scroller = document.createElement('div');
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outer_scroller.style.width = '100px';
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outer_scroller.style.height = '100px';
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outer_scroller.style.overflow = 'scroll';
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const table = document.createElement('div');
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table.style.display = 'table';
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const tr = document.createElement('div');
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tr.style.display = 'table-row';
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const inner_scroller = document.createElement('div');
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inner_scroller.style.display = 'table-cell';
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inner_scroller.style.overflow = 'hidden';
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const sticky = document.createElement('div');
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sticky.style.width = '20px';
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sticky.style.height = '20px';
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sticky.style.position = 'sticky';
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sticky.style.top = '0';
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sticky.style.background = 'red';
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const spacer = document.createElement('div');
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spacer.style.height = '500px';
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inner_scroller.appendChild(sticky);
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inner_scroller.appendChild(spacer);
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tr.append(inner_scroller);
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table.appendChild(tr);
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outer_scroller.appendChild(table);
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document.body.appendChild(outer_scroller);
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outer_scroller.scrollTop = 50;
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// The sticky should attach to the inner scroller, and so should not stick.
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assert_equals(sticky.offsetTop, inner_scroller.offsetTop);
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}, 'A sticky element should attach to an overflow:hidden ancestor inside a table');
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</script>
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