expressjsHow do I use URL parameters in Express.js?
URL parameters are a way to pass data from the client to the server in an Express.js application. They are typically used to pass information that is used to customize the response for a particular request.
For example, to use URL parameters in an Express.js application, you can use the req.params
object. Here is an example of how to use this object in a route:
app.get('/user/:name', (req, res) => {
const name = req.params.name;
res.send(`Welcome, ${name}!`);
});
If we make a request to /user/John
, we will get the output Welcome, John!
Code explanation
app.get()
: the Express.js method used to register a route/user/:name
: the route URL, where:name
is a parameterreq.params.name
: the object used to access the URL parameterres.send()
: the Express.js method used to send a response
For more information about URL parameters in Express.js, see the documentation.
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