| <!DOCTYPE html> |
| <title>CSS Anchor Positioning: Invalidation when the anchor*() fallback matches old style</title> |
| <link rel="help" href="https://drafts.csswg.org/css-anchor-position-1/"> |
| <link rel="help" href="https://issues.chromium.org/issues/333858786"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <style> |
| #cb { |
| position: relative; |
| width: 200px; |
| height: 200px; |
| border: 1px solid black; |
| } |
| |
| #anchor { |
| anchor-name: --a; |
| position: absolute; |
| width: 40px; |
| height: 30px; |
| left: 75px; |
| top: 75px; |
| background: coral; |
| } |
| |
| #anchored { |
| position: absolute; |
| background: seagreen; |
| width: 50px; |
| height: 50px; |
| } |
| |
| #anchored.change { |
| /* The fallbacks match what the unchanged style says, but we shouldn't |
| take the fallbacks here. */ |
| width: anchor-size(--a width, 50px); |
| height: anchor-size(--a height, 50px); |
| } |
| </style> |
| <div id=cb> |
| <div id=anchor></div> |
| <div id=anchored>X</div> |
| </div> |
| <script> |
| test(() => { |
| assert_equals(anchored.offsetWidth, 50); |
| assert_equals(anchored.offsetHeight, 50); |
| |
| anchored.classList.toggle('change'); |
| |
| assert_equals(anchored.offsetWidth, 40); |
| assert_equals(anchored.offsetHeight, 30); |
| }, 'Correct invalidation when fallbacks match the old style'); |
| </script> |
