| <!DOCTYPE html> |
| <title>CSS Values and Units Test: line-height transition affecting lh units</title> |
| <link rel="help" href="https://www.w3.org/TR/css-values-4/#lh"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <style> |
| #target { |
| width: 20lh; |
| line-height: 10px; |
| transition: line-height 1s; |
| } |
| #target.lh { |
| line-height: 20px; |
| } |
| </style> |
| <div id="target"></div> |
| <script> |
| let t = async_test("lh unit length should change with transitioning line-height"); |
| |
| t.step(() => { |
| target.offsetTop; |
| target.className = "lh"; |
| }); |
| |
| requestAnimationFrame(() => requestAnimationFrame(() => requestAnimationFrame(() => { |
| t.step(() => { |
| assert_not_equals(getComputedStyle(target).width, "200px"); |
| assert_not_equals(getComputedStyle(target).width, "400px"); |
| t.done(); |
| }, "Transition should be progressing. Not at start/end."); |
| }))); |
| </script> |
