| <!DOCTYPE html> |
| <title>Tests that finding a default anchor triggers the new scrollable containing-block.</title> |
| <link rel="help" href="https://drafts.csswg.org/css-anchor-position-1/"> |
| <link rel="help" href="https://drafts.csswg.org/css-position-4/#scrollable-containing-block"> |
| <link rel="help" href="https://github.com/w3c/csswg-drafts/issues/12552"> |
| <style> |
| .scroller { |
| /* Use overflow hidden instead of scroll to mitigate scrollbar differences. */ |
| overflow: hidden; |
| position: relative; |
| width: 80px; |
| height: 80px; |
| margin: 10px; |
| border: solid 3px; |
| padding: 10px; |
| } |
| |
| .filler { |
| min-width: 180px; |
| min-height: 180px; |
| } |
| |
| .anchor { |
| anchor-name: --a; |
| } |
| |
| .target { |
| position: absolute; |
| inset: 0; |
| place-self: stretch; |
| } |
| </style> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/resources/check-layout-th.js"></script> |
| <body onload="checkLayout('.target')"> |
| |
| <!-- No default anchor should use the regular containing-block. --> |
| <div class="scroller"> |
| <div class="filler"><div class="anchor"></div></div> |
| <div class="target" data-expected-width="100" data-expected-height="100"></div> |
| </div> |
| |
| <!-- A default anchor - should use the scrollable containing-block. --> |
| <div class="scroller"> |
| <div class="filler"><div class="anchor"></div></div> |
| <div class="target" style="position-anchor: --a;" data-expected-width="200" data-expected-height="200"></div> |
| </div> |
| |
| <!-- A non-valid default anchor - should use the regular containing-block. --> |
| <div class="scroller"> |
| <div class="filler"><div class="anchor"></div></div> |
| <div class="target" style="position-anchor: --b;" data-expected-width="100" data-expected-height="100"></div> |
| </div> |
| |
| <!-- Only specifying position-area - should use the regular containing-block. --> |
| <div class="scroller"> |
| <div class="filler"><div class="anchor"></div></div> |
| <div class="target" style="position-area: top;" data-expected-width="100" data-expected-height="100"></div> |
| </div> |
