| <!DOCTYPE html> |
| <title>CSS Anchor Positioning Test: @position-try and cascade interaction</title> |
| <link rel="help" href="https://drafts.csswg.org/css-anchor-position-1/#fallback-apply"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <style> |
| .cb { |
| position: relative; |
| width: 100px; |
| height: 100px; |
| background: lightpink; |
| display: inline-block; |
| } |
| .abs { |
| position: absolute; |
| background: darkcyan; |
| left: 0px; |
| top: 0px; |
| width: 150px; /* force fallback */ |
| height: 25px; |
| position-try-fallbacks: --pf; |
| } |
| @position-try --pf { |
| width: 50px; |
| left: 50px; |
| top: 50px; |
| } |
| </style> |
| |
| <!-- Basic @position-try rule --> |
| <div class=cb> |
| <div id=abs_try class=abs></div> |
| </div> |
| <script> |
| test(() => { |
| assert_equals(abs_try.offsetLeft, 50); |
| assert_equals(abs_try.offsetTop, 50); |
| }, '@position-try rule applies'); |
| </script> |
| |
| <!-- Inline style --> |
| <div class=cb> |
| <div id=abs_inline class=abs style="left:20px"></div> |
| </div> |
| <script> |
| test(() => { |
| assert_equals(abs_inline.offsetLeft, 50); |
| assert_equals(abs_inline.offsetTop, 50); |
| }, '@position-try rule wins over inline style'); |
| </script> |
| |
| <!-- !important --> |
| <style> |
| #abs_important { |
| left: 10px !important; |
| } |
| </style> |
| <div class=cb> |
| <div id=abs_important class=abs></div> |
| </div> |
| <script> |
| test(() => { |
| assert_equals(abs_important.offsetLeft, 10); |
| assert_equals(abs_important.offsetTop, 50); |
| }, '@position-try rule does not win over !important'); |
| </script> |
| |
| <!-- Animations --> |
| <style> |
| @keyframes anim { |
| from { top: 20px; } |
| to { top: 20px; } |
| } |
| #abs_animation { |
| animation: anim 1000s steps(2, start) paused; |
| } |
| </style> |
| <div class=cb> |
| <div id=abs_animation class=abs></div> |
| </div> |
| <script> |
| test(() => { |
| assert_equals(abs_animation.offsetLeft, 50); |
| assert_equals(abs_animation.offsetTop, 20); |
| }, '@position-try rule does not win over animations'); |
| </script> |
| |
| <!-- Transitions --> |
| <style> |
| #abs_transition.move { |
| top: 10px !important; |
| transition: top 1000s steps(2, start); |
| </style> |
| <div class=cb> |
| <div id=abs_transition class=abs></div> |
| </div> |
| <script> |
| test(() => { |
| abs_transition.offsetTop; |
| abs_transition.classList.add('move'); |
| assert_equals(abs_transition.offsetLeft, 50); |
| assert_equals(abs_transition.offsetTop, 30); |
| }, '@position-try rule does not win over transitions'); |
| </script> |
| |
| <!-- revert / revert-layer --> |
| <style> |
| #abs_revert { |
| position-try-fallbacks: --pf-revert; |
| } |
| @layer author-layer { |
| #abs_revert { |
| top: 30px; |
| left: 30px; |
| } |
| } |
| #abs_revert { |
| top: 20px; |
| left: 20px; |
| /* overflowing .cb to force --pf-revert to be applied */ |
| width: 200px; |
| height: 200px; |
| } |
| @position-try --pf-revert { |
| left: revert; |
| top: revert-layer; |
| width: 30px; |
| height: 30px; |
| } |
| </style> |
| <div class=cb class=abs> |
| <div id=abs_revert class=abs></div> |
| </div> |
| <script> |
| test(() => { |
| assert_equals(abs_revert.offsetLeft, 0, "left reverted back to user origin"); |
| assert_equals(abs_revert.offsetTop, 20, "top reverted back to author"); |
| assert_equals(abs_revert.offsetWidth, 30, "width from --pf-revert"); |
| assert_equals(abs_revert.offsetHeight, 30, "height from --pf-revert"); |
| }, '@position-try revert / revert-layer reverts to user / author origin'); |
| </script> |
