Chapter 6 – Test Tools
Service Worker – ISTQB Definition
Last Updated: July 12, 2026 · SoftwareTestPilot QA Team
Official ISTQB Definition
A script that a browser runs in the background separately from a web page, enabling offline caching, push notifications, and background sync.
In simple words
A script that runs behind a webpage to enable offline mode and push notifications.
Exam tip
Service workers are what make PWAs installable and offline-capable.
Related terms
Practice this term in the ISTQB Mock Test
40 CTFL v4.0 questions, 60-minute timer, instant scoring and chapter-wise breakdown.
Practice in Mock Test