| <!DOCTYPE html> |
| <title>:fullscreen pseudo-class support</title> |
| <link rel="help" href="https://fullscreen.spec.whatwg.org/#:fullscreen-pseudo-class"> |
| <link rel="help" href="https://dom.spec.whatwg.org/#dom-element-matches"> |
| <link rel="help" href="https://dom.spec.whatwg.org/#dom-parentnode-queryselector"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <body> |
| <script> |
| // This is a separate test so that support for :fullscreen can be detected |
| // without actually going fullscreen. If it were not supported, then this test |
| // would fail. |
| test(t => { |
| // precondition is to throw for unknown pseudo-classes: |
| assert_throws_dom("SyntaxError", () => document.body.matches(':halfscreen')); |
| assert_throws_dom("SyntaxError", () => document.querySelector(':halfscreen')); |
| // the actual test: |
| assert_false(document.body.matches(':fullscreen')); |
| assert_equals(document.querySelector(':fullscreen'), null); |
| }); |
| </script> |
