Question
Download Solution PDFWhich Javascript feature will let you create push notifications?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is Option 3) Service worker.
Key Points
- Service workers are JavaScript scripts that run in the background of a web browser, separate from the main web page.
- They enable powerful features like:
- Push notifications
- Background sync
- Offline capabilities using caching (via PWA – Progressive Web Apps)
- To create push notifications, the service worker listens to
'push'events and shows notifications using theNotification API.
Additional Information
- Option 1 – JQuery: ❌ A JavaScript library for DOM manipulation and AJAX, not used for notifications.
- Option 2 – Ajax: ❌ Asynchronous requests to server, doesn't support push notifications.
- Option 4 – Event listener: ❌ Listens for events like clicks or keypresses, not push notifications specifically.
Conclusion: To implement push notifications in JavaScript, Service workers are the correct and essential feature.
Last updated on Nov 25, 2024
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