| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <script> | |
| // Records if 'onprerenderingchange' event is triggered at least once. | |
| const onprerenderingchange_observed_promise = new Promise(resolve => { | |
| document.addEventListener('prerenderingchange', () => { | |
| resolve(true); | |
| }); | |
| }); | |
| </script> | |
| </head> | |
| </html> |