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| 1 | +<!DOCTYPE html> |
| 2 | +<html> |
| 3 | +<head> |
| 4 | +<meta charset="utf-8"> |
| 5 | +<title>CSS Grid Test: Sibling nested subgrids with overflow:hidden leaf contribute equally to their tracks</title> |
| 6 | +<link rel="help" href="https://drafts.csswg.org/css-grid-2/#subgrid-item-contribution"> |
| 7 | +<link rel="help" href="https://drafts.csswg.org/css-grid-2/#subgrids"> |
| 8 | +<meta name="assert" content="Test passes if the row heights of nested-subgrid leaves with overflow:hidden are identical across sibling subgrids, regardless of each sibling's position in the outer grid. This test only checks row sizing; column sizing is not exercised."> |
| 9 | +<script src="/resources/testharness.js"></script> |
| 10 | +<script src="/resources/testharnessreport.js"></script> |
| 11 | +<style> |
| 12 | +.grid { |
| 13 | + display: grid; |
| 14 | + gap: 16px; |
| 15 | + width: 400px; |
| 16 | +} |
| 17 | +.card { |
| 18 | + border: 1px solid black; |
| 19 | + display: grid; |
| 20 | + grid-template-rows: subgrid; |
| 21 | + grid-row: span 3; |
| 22 | + row-gap: 0; |
| 23 | +} |
| 24 | +.content { |
| 25 | + display: grid; |
| 26 | + grid-template-rows: subgrid; |
| 27 | + grid-row: span 2; |
| 28 | + padding: 16px; |
| 29 | +} |
| 30 | +.footer { |
| 31 | + overflow: hidden; |
| 32 | +} |
| 33 | +</style> |
| 34 | +</head> |
| 35 | +<body> |
| 36 | +<div class="grid"> |
| 37 | + <div class="card"> |
| 38 | + <h2>Top</h2> |
| 39 | + <div class="content"> |
| 40 | + <div class="footer" id="f1"> |
| 41 | + Long text long enough to wrap onto multiple lines so that overflow:hidden can clip the overflowing portion |
| 42 | + </div> |
| 43 | + </div> |
| 44 | + </div> |
| 45 | + <div class="card"> |
| 46 | + <h2>Top</h2> |
| 47 | + <div class="content"> |
| 48 | + <div class="footer" id="f2"> |
| 49 | + Long text long enough to wrap onto multiple lines so that overflow:hidden can clip the overflowing portion |
| 50 | + </div> |
| 51 | + </div> |
| 52 | + </div> |
| 53 | + <div class="card"> |
| 54 | + <h2>Top</h2> |
| 55 | + <div class="content"> |
| 56 | + <div class="footer" id="f3"> |
| 57 | + Long text long enough to wrap onto multiple lines so that overflow:hidden can clip the overflowing portion |
| 58 | + </div> |
| 59 | + </div> |
| 60 | + </div> |
| 61 | +</div> |
| 62 | +<script> |
| 63 | +test(() => { |
| 64 | + const h1 = document.getElementById("f1").getBoundingClientRect().height; |
| 65 | + const h2 = document.getElementById("f2").getBoundingClientRect().height; |
| 66 | + const h3 = document.getElementById("f3").getBoundingClientRect().height; |
| 67 | + assert_equals(h2, h1, "Second card's .footer height matches the first's"); |
| 68 | + assert_equals(h3, h1, "Third card's .footer height matches the first's"); |
| 69 | +}, "Sibling nested subgrids with overflow:hidden leaves must size their rows identically"); |
| 70 | +</script> |
| 71 | +</body> |
| 72 | +</html> |
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