Answer
Node uses async_hooks to track async boundaries. Limitations include overhead, incomplete coverage for some libraries, and microtask behavior that complicates context propagation.
Quick Answer
Node.js tracks async context via async_hooks — each async operation gets an async resource with an ID. When a callback runs, Node restores the async context of its parent. AsyncLocalStorage uses this to propagate key-value stores through async chains automatically. Limitations: performance overhead in high-throughput paths, and not all async sources support it perfectly.
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