jsschools

req.params

An object of named route parameters captured from the URL path.

Since Express 4 Spec ↗

Syntax

req.params

Returns

object — Maps each route param name to its string value.

Examples

app.get('/users/:id/posts/:postId', (req, res) => {
  res.json(req.params);
});
Output 
$ curl localhost:3000/users/7/posts/42
{"id":"7","postId":"42"}

app.get('/files/*splat', (req, res) => {
  res.send(req.params.splat.join('/'));
});
Output 
$ curl localhost:3000/files/a/b/c.txt
a/b/c.txt

Notes

All values are strings - convert with `Number()` as needed. In Express 5 wildcards must be named (`*splat`) and the captured value is an array of segments. Always validate params before using them in queries.

See also