| <!DOCTYPE html> |
| <meta charset="utf-8"> |
| <title>Cross-realm access of supportedEntryTypes returns Array of another realm</title> |
| <link rel="help" href="https://w3c.github.io/performance-timeline/#supportedentrytypes-attribute"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <body> |
| <script> |
| test(t => { |
| const iframe = document.createElement("iframe"); |
| t.add_cleanup(() => { iframe.remove(); }); |
| iframe.onload = t.step_func_done(() => { |
| const otherWindow = iframe.contentWindow; |
| assert_true(otherWindow.PerformanceObserver.supportedEntryTypes instanceof otherWindow.Array); |
| }); |
| document.body.append(iframe); |
| }); |
| </script> |
