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Understanding the Request Object in Express.js

In Express.js, we use the req object to get data from the client. Here are some key parts I frequently used:

req.body​

req.body holds data sent by the client in a POST request. We use a tool called body-parser to help us read this data.

req.params​

req.params is where we find route parameters.

For example, in a route like /user/:id, we can get the id value with req.params.id.

req.query​

req.query gives us the URL query parameters. If our URL is /search?q=express, we can get the q value with req.query.q.