| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset="utf-8"> |
| <meta name="timeout" content="long"> |
| <meta name="author" title="Keith Cirkel" href="mailto:wpt@keithcirkel.co.uk" /> |
| <link rel="help" href="https://html.spec.whatwg.org/multipage/custom-elements.html#custom-state-pseudo-class" /> |
| <title>CustomStateSet doesn't crash after GC on detached node</title> |
| |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/common/gc.js"></script> |
| </head> |
| <body> |
| <custom-state id="myCE"></custom-state> |
| <script> |
| customElements.define('custom-state', class extends HTMLElement { |
| connectedCallback() { |
| this.elementInternals = this.attachInternals(); |
| } |
| }); |
| |
| promise_test(async function() { |
| const states = myCE.elementInternals.states; |
| myCE.remove(); |
| await garbageCollect(); |
| states.add('still-works'); |
| assert_equals(states.size, 1); |
| assert_true(states.delete('still-works')); |
| assert_equals(states.size, 0); |
| }, "customstateset doesn't crash after GC on detached node"); |
| </script> |
| </body> |
| </html> |
