| <!DOCTYPE html> |
| <title>CSS Anchor Positioning Test: anchor function with sibling-index()</title> |
| <link rel="help" href="https://drafts.csswg.org/css-anchor-position-1/#anchor-pos"> |
| <link rel="help" href="https://drafts.csswg.org/css-values-5/#funcdef-sibling-index"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <style> |
| body { margin: 0; } |
| #anchor { |
| anchor-name: --a; |
| width: 100px; |
| height: 100px; |
| } |
| #abs { |
| position-anchor: --a; |
| position: absolute; |
| top: anchor(calc(25% * sibling-index())); |
| width: 100px; |
| height: 100px; |
| background: teal; |
| } |
| </style> |
| <div> |
| <div id="anchor"></div> |
| <div id="abs"></div> |
| </div> |
| <script> |
| test(() => { |
| assert_equals(getComputedStyle(abs).top, "50px", "25% multiplied by 2 (sibling-index()) of 100px") |
| }, "Percentage based anchor() position with sibling-index()"); |
| </script> |
