line-height-lh-transition.html (947B)
1 <!DOCTYPE html> 2 <title>CSS Values and Units Test: line-height transition affecting lh units</title> 3 <link rel="help" href="https://www.w3.org/TR/css-values-4/#lh"> 4 <script src="/resources/testharness.js"></script> 5 <script src="/resources/testharnessreport.js"></script> 6 <style> 7 #target { 8 width: 20lh; 9 line-height: 10px; 10 transition: line-height 1s; 11 } 12 #target.lh { 13 line-height: 20px; 14 } 15 </style> 16 <div id="target"></div> 17 <script> 18 let t = async_test("lh unit length should change with transitioning line-height"); 19 20 t.step(() => { 21 target.offsetTop; 22 target.className = "lh"; 23 }); 24 25 requestAnimationFrame(() => requestAnimationFrame(() => requestAnimationFrame(() => { 26 t.step(() => { 27 assert_not_equals(getComputedStyle(target).width, "200px"); 28 assert_not_equals(getComputedStyle(target).width, "400px"); 29 t.done(); 30 }, "Transition should be progressing. Not at start/end."); 31 }))); 32 </script>