is-where-shadow.html (2467B)
1 <!DOCTYPE html> 2 <title>:is() inside shadow pseudos</title> 3 <script src="/resources/testharness.js"></script> 4 <script src="/resources/testharnessreport.js"></script> 5 <link rel="help" href="https://drafts.csswg.org/selectors-4/#matches"> 6 <link rel="help" href="https://drafts.csswg.org/css-scoping/#host-selector"> 7 <link rel="help" href="https://drafts.csswg.org/css-scoping/#slotted-pseudo"> 8 <div class="parent1"><div id="host1" class=a><p class=e>::slotted</p></div></div> 9 <div class="parent2"><div id="host2" class=b><p class=d>::slotted</p></div></div> 10 <div class="parent3"><div id="host3" class=c><p class=f>::slotted</p></div></div> 11 </div> 12 <script> 13 let shadow1 = host1.attachShadow({ mode: 'open' }); 14 let shadow2 = host2.attachShadow({ mode: 'open' }); 15 let shadow3 = host3.attachShadow({ mode: 'open' }); 16 17 const html = ` 18 <style> 19 * { color: blue; } 20 :host(:is(.a, .b)) b { color: green; } 21 :host-context(:is(.parent1, .parent2)) i { color: green; } 22 ::slotted(:is(.e, .f)) { color: green; } 23 24 /* The following should not match: */ 25 :host(:is(.z)) b { color: red; } 26 :host(:is(.a + .b)) b { color: red; } 27 :host-context(:is(.z)) i { color: red; } 28 :host-context(:is(.parent1 .parent2)) i { color: red; } 29 ::slotted(:is(.z)) { color: red; } 30 ::slotted(:is(.a > .b)) { color: red; } 31 </style> 32 <b>:host</b> 33 <i>:host-context</i> 34 <slot></slot> 35 `; 36 37 shadow1.innerHTML = html; 38 shadow2.innerHTML = html; 39 shadow3.innerHTML = html; 40 41 const getComputedColor = e => getComputedStyle(e).color; 42 const green = 'rgb(0, 128, 0)'; 43 const blue = 'rgb(0, 0, 255)'; 44 45 test(function() { 46 assert_equals(getComputedColor(shadow1.querySelector('b')), green); 47 assert_equals(getComputedColor(shadow2.querySelector('b')), green); 48 assert_equals(getComputedColor(shadow3.querySelector('b')), blue); 49 }, ':is() inside :host()'); 50 51 test(function() { 52 assert_equals(getComputedColor(shadow1.querySelector('i')), green); 53 assert_equals(getComputedColor(shadow2.querySelector('i')), green); 54 assert_equals(getComputedColor(shadow3.querySelector('i')), blue); 55 }, ':is() inside :host-context()'); 56 57 test(function() { 58 assert_equals(getComputedColor(document.querySelector('.e')), green); 59 assert_equals(getComputedColor(document.querySelector('.d')), blue); 60 assert_equals(getComputedColor(document.querySelector('.f')), green); 61 }, ':is() inside ::slotted()'); 62 </script>