| <!DOCTYPE html> | |
| <title>CSS Anchor Positioning: Pseudo elements as anchors</title> | |
| <link rel="help" href="https://drafts.csswg.org/css-anchor-1/#position-anchor"> | |
| <script src="/resources/testharness.js"></script> | |
| <script src="/resources/testharnessreport.js"></script> | |
| <style> | |
| .cb { | |
| position: relative; | |
| width: 200px; | |
| height: 200px; | |
| } | |
| #anchor1::before { | |
| display: block; | |
| width: 100px; | |
| height: 100px; | |
| content: ""; | |
| anchor-name: --a1; | |
| background: blue; | |
| } | |
| #anchor2::after { | |
| display: block; | |
| width: 100px; | |
| height: 100px; | |
| content: ""; | |
| anchor-name: --a2; | |
| background: pink; | |
| } | |
| .anchored { | |
| position: absolute; | |
| width: 100px; | |
| height: 100px; | |
| left: anchor(right); | |
| top: anchor(bottom); | |
| background: orange; | |
| } | |
| #anchored1 { position-anchor: --a1; } | |
| #anchored2 { position-anchor: --a2; } | |
| </style> | |
| <div class="cb"> | |
| <div id="anchor1"></div> | |
| <div id="anchored1" class="anchored"></div> | |
| </div> | |
| <div class="cb"> | |
| <div id="anchor2"></div> | |
| <div id="anchored2" class="anchored"></div> | |
| </div> | |
| <script> | |
| test(() => { | |
| assert_equals(anchored1.offsetLeft, 100); | |
| assert_equals(anchored1.offsetTop, 100); | |
| }, "::before as anchor"); | |
| test(() => { | |
| assert_equals(anchored2.offsetLeft, 100); | |
| assert_equals(anchored2.offsetTop, 100); | |
| }, "::after as anchor"); | |
| </script> |