getComputedStyle-display-none-001.html (1783B)
1 <!doctype html> 2 <meta charset="utf-8"> 3 <title>CSSOM: getComputedStyle gets invalidated for display: none elements (inheritance)</title> 4 <link rel="help" href="https://drafts.csswg.org/cssom/#dom-window-getcomputedstyle"> 5 <link rel="help" href="https://bugs.webkit.org/show_bug.cgi?id=186882"> 6 <link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io"> 7 <script src=/resources/testharness.js></script> 8 <script src=/resources/testharnessreport.js></script> 9 <style> 10 #undisplayed, #host { 11 display: none; 12 color: red; 13 } 14 </style> 15 <div id="undisplayed"><div id="child"></div></div> 16 <div id="host"></div> 17 <script> 18 test(function() { 19 let undisplayed_style = getComputedStyle(undisplayed); 20 let undisplayed_child_style = getComputedStyle(child); 21 assert_equals(undisplayed_style.color, "rgb(255, 0, 0)"); 22 assert_equals(undisplayed_child_style.color, "rgb(255, 0, 0)"); 23 undisplayed.style.color = "green"; 24 assert_equals(undisplayed_style.color, "rgb(0, 128, 0)"); 25 assert_equals(undisplayed_child_style.color, "rgb(0, 128, 0)"); 26 }, "getComputedStyle gets invalidated in display: none subtrees due to inherited changes to an ancestor"); 27 test(function() { 28 host.attachShadow({ mode: 'open' }).innerHTML = ` 29 <div></div> 30 `; 31 let host_style = getComputedStyle(host); 32 let shadow_style = getComputedStyle(host.shadowRoot.firstElementChild); 33 assert_equals(host_style.color, "rgb(255, 0, 0)"); 34 assert_equals(shadow_style.color, "rgb(255, 0, 0)"); 35 host.style.color = "green"; 36 assert_equals(host_style.color, "rgb(0, 128, 0)"); 37 assert_equals(shadow_style.color, "rgb(0, 128, 0)"); 38 }, "getComputedStyle gets invalidated in display: none subtrees due to inherited changes to an ancestor shadow host"); 39 </script>