Answer
Service workers run in the background, independent of web pages.
- Enable offline support
- Implement caching strategies
- Handle push notifications
- Provide background sync
They form the foundation of Progressive Web Apps (PWAs).
Quick Answer
Service Workers are background scripts that run separately from the main page — they can intercept network requests, cache responses, and enable offline functionality. They're the foundation of Progressive Web Apps (PWAs). They run only over HTTPS, have no DOM access, and persist between sessions. Cache-first or network-first strategies control offline behavior.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ