| <!DOCTYPE html> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="resources/open-blank-host.js"></script> |
| <script> |
| promise_test(async () => { |
| assert_implements("HTMLPortalElement" in self); |
| var win = await openBlankPortalHost(); |
| var portal = win.document.createElement("portal"); |
| portal.src = new URL("resources/simple-portal.html", location.href) |
| |
| await new Promise((resolve, reject) => { |
| portal.onload = resolve; |
| win.document.body.appendChild(portal); |
| }); |
| |
| return portal.activate(); |
| }); |
| </script> |
