Answer
Web APIs provide browser-based functionalities accessible to JavaScript.
Examples include:
- DOM API
- Fetch API
- Web Storage
- WebSockets
- Canvas API
- Service Workers
They enable dynamic, interactive, and offline-capable web applications.
Quick Answer
Web APIs are browser-provided APIs available in JavaScript: setTimeout, fetch, DOM API, localStorage, Geolocation, WebSockets, Canvas, etc. They run outside the JS engine (in C++ browser code), allowing async operations. When they complete, they push callbacks to the event queue. The JS engine itself has no I/O — Web APIs provide it.
S
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