| <!DOCTYPE html> |
| <title>CSS Values and Units Test: sibling-index() changing font-style during @keyframes animation</title> |
| <link rel="help" href="https://drafts.csswg.org/css-values-5/#tree-counting"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <style> |
| @keyframes --anim { |
| from { |
| font-style: oblique calc(5deg * sibling-index()); |
| } |
| to { |
| font-style: oblique 9deg; |
| } |
| } |
| #target { |
| animation: --anim 1000s step-end; |
| } |
| </style> |
| <div> |
| <div id="rm"></div> |
| <div></div> |
| <div id="target"></div> |
| </div> |
| <script> |
| test(() => { |
| assert_equals(getComputedStyle(target).fontStyle, "oblique 15deg"); |
| }, "Initially, the sibling-index() is 3 for #target"); |
| |
| test(() => { |
| rm.remove(); |
| assert_equals(getComputedStyle(target).fontStyle, "oblique 10deg"); |
| }, "Removing a preceding sibling of #target reduces the sibling-index()"); |
| </script> |
