| <!doctype HTML> |
| <html> |
| <meta charset="utf8"> |
| <title>Content Visibility: focus on display none element</title> |
| <link rel="author" title="Rakina Zata Amni" href="mailto:rakina@chromium.org"> |
| <link rel="help" href="https://drafts.csswg.org/css-contain/#content-visibility"> |
| <meta name="assert" content="tab navigation skips display none elements in an auto subtree"> |
| |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| |
| <style> |
| .spacer { |
| height: 3000px; |
| } |
| .auto { |
| content-visibility: auto; |
| } |
| </style> |
| |
| <div class=spacer></div> |
| <div id="container" style="content-visibility: auto"> |
| <div id="focusableA" tabindex="0">a</div> |
| <div id="focusableB" tabindex="0">b</div> |
| </div> |
| |
| <script> |
| test(() => { |
| focusableA.style = "display: none;"; |
| eventSender.keyDown("Tab", []); |
| assert_equals(document.activeElement, focusableB); |
| eventSender.keyDown("Tab", []); |
| assert_equals(document.activeElement, focusableB); |
| focusableA.style = "display: block;"; |
| eventSender.keyDown("Tab", []); |
| assert_equals(document.activeElement, focusableA); |
| }, "Trying to focus on an element in a locked subtree that's not visible will skip that element"); |
| </script> |
| </html> |
