| <!DOCTYPE html> |
| <title>Check the focus state of prerendering pages</title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <body> |
| <input type="text" id = "prerenderTextField"> |
| <script> |
| |
| // Check this page is being prerendered. |
| assert_true(document.prerendering); |
| |
| const bc = new BroadcastChannel('prerender-channel'); |
| |
| // Try to set focus. |
| const element = document.getElementById('prerenderTextField'); |
| element.focus(); |
| |
| // Post the focus and active states to the initiator page. |
| bc.postMessage({ |
| activeElementUpdated: document.activeElement === element, |
| documentHasFocus: document.hasFocus()}); |
| bc.close(); |
| |
| </script> |
| </body> |
