Answer
Web Workers run scripts in background threads.
Prevent blocking the main UI thread during heavy computations.
Quick Answer
Web Workers run JavaScript in a background thread — no DOM access, but full JS execution. They communicate with the main thread via postMessage(). Use them for CPU-intensive tasks (image processing, data compression, complex calculations) that would freeze the UI if run on the main thread. Workers are separate OS threads, not the event loop.
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