scope-supports.html (1120B)
1 <!DOCTYPE html> 2 <title>@scope - inner @supports</title> 3 <link rel="help" href="https://drafts.csswg.org/css-cascade-6/#scope-atrule"> 4 <link rel="help" href="https://drafts.csswg.org/css-conditional-3/#at-supports"> 5 <link rel="help" href="https://drafts.csswg.org/css-cascade-5/#scope-scope"> 6 <script src="/resources/testharness.js"></script> 7 <script src="/resources/testharnessreport.js"></script> 8 <style> 9 @scope (.a) { 10 @supports (width:0px) { 11 :scope { 12 z-index: 1; 13 } 14 15 .b { 16 background-color: green; 17 } 18 } 19 } 20 </style> 21 <main> 22 <div class=a> 23 <div class=b> 24 </div> 25 </div> 26 <div class=b></div> 27 </main> 28 <script> 29 test(() => { 30 let a = document.querySelector('main > .a'); 31 let b = document.querySelector('main > .a > .b'); 32 assert_equals(getComputedStyle(a).zIndex, '1'); 33 assert_equals(getComputedStyle(b).backgroundColor, 'rgb(0, 128, 0)'); 34 35 let out_of_scope_b = document.querySelector('main > .b'); 36 assert_equals(getComputedStyle(out_of_scope_b).backgroundColor, 'rgba(0, 0, 0, 0)'); 37 }, 'Style rules within @supports are scoped'); 38 </script>