| <!DOCTYPE html> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script> |
| |
| promise_test(async (t) => { |
| assert_precondition("HTMLPortalElement" in self); |
| let hostWindow = window.open(); |
| assert_equals(hostWindow.location.href, "about:blank"); |
| |
| let portal = hostWindow.document.createElement("portal"); |
| portal.src = "resources/simple-portal.html"; |
| hostWindow.document.body.appendChild(portal); |
| |
| await promise_rejects_dom(t, "InvalidStateError", portal.activate()); |
| }, "about:blank cannot host a portal"); |
| |
| </script> |
