| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Service Worker for a background service test</title> | |
| <script> | |
| let sw = null; | |
| async function installSW() { | |
| sw = await navigator.serviceWorker.register('service-worker.js'); | |
| await navigator.serviceWorker.ready; | |
| sw.active.postMessage('Posting message!'); | |
| } | |
| async function waitForMessageFromSW() { | |
| return await new Promise( | |
| resolve => navigator.serviceWorker.onmessage = e => resolve(e.data)); | |
| } | |
| </script> | |
| </head> | |
| <body></body> | |
| </html> |