What is the purpose of express.Router?
Model answer
A Router is a mini application for grouping related routes, for example all /api/users routes in one file, then mounting it with app.use('/api/users', usersRouter). It keeps route files small and lets you attach middleware to a group.
Learn this topic
Express Middleware Explained: next(), Logging and express.json() in the course Node.js and Express: Build a Back End API from Scratch.
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