| <html> |
| <script> |
| |
| async function installServiceWorker() { |
| try { |
| await navigator.serviceWorker.register('/?file=empty_worker.js'); |
| await navigator.serviceWorker.ready; |
| return true; |
| } catch { |
| return false; |
| } |
| } |
| |
| async function updateServiceWorker() { |
| try { |
| const registrations = await navigator.serviceWorker.getRegistrations(); |
| await registrations[0].update(); |
| return true; |
| } catch { |
| return false; |
| } |
| } |
| |
| async function hasServiceWorker() { |
| const registrations = await navigator.serviceWorker.getRegistrations(); |
| return registrations.length > 0; |
| } |
| |
| </script> |
| <body> |
| This page is used to test creation, update and deletion service workers. |
| </body> |
| |
| </html> |
