| <!DOCTYPE html> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <body> |
| <script> |
| promise_test(() => { |
| assert_implements("HTMLPortalElement" in self); |
| var portal = document.createElement("portal"); |
| portal.src = "resources/portals-nested-portal.html"; |
| document.body.appendChild(portal); |
| var waitForMessage = new Promise((resolve, reject) => { |
| portal.onmessage = resolve; |
| }); |
| return waitForMessage; |
| }, "nested portals shouldn't crash"); |
| </script> |
| </body> |
