Answer
Middleware chaining passes control from one middleware to another using next(), building a request pipeline for logging, parsing, authentication, etc.
Quick Answer
Middleware chaining in Express means each middleware calls next() to pass control to the next one in line. The chain runs in the order you define them: logging → authentication → body parsing → route handler. If any middleware doesn't call next() or send a response, the request just hangs. Order matters significantly.
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