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req.params Property in Express.js
The req.params property is an object that contains the properties which are mapped to the named route "parameters". For example, if you have a route as /api/:name, then the "name" property is available as req.params.name. The default value of this object is {}.
Syntax
req.params
Example 1
Create a file with the name "reqParams.js" and copy the following code snippet. After creating the file, use the command "node reqParams.js" to run this code as shown in the example below −
// req.params Property Demo Example
// Importing the express
var express = require('express');
// Initializing the express and port number
var app = express();
// Initializing the router from express
var router = express.Router();
var PORT = 3000;
// Defining an Endpoint
app.get('/api/:name', function (req, res) {
console.log(req.params['name']);
res.send(req.params['name']);
});
app.listen(PORT, function(err){
if (err) console.log(err);
console.log("Server listening on PORT", PORT);
});Hit the following Endpoint with a GET request −
localhost:3000/api/TutorialsPoint
Output
C:\home
ode>> node reqParams.js Server listening on PORT 3000 TutorialsPoint
Example 2
Let's take a look at one more example.
// req.params Property Demo Example
// Importing the express
var express = require('express');
// Initializing the express and port number
var app = express();
// Initializing the router from express
var router = express.Router();
var PORT = 3000;
// Defining an Endpoint
app.get('/api/:name/:tagLine', function (req, res) {
console.log("Name : ", req.params['name']);
console.log("TagLine : ", req.params['tagLine'])
res.send(req.params['name']);
});
app.listen(PORT, function(err){
if (err) console.log(err);
console.log("Server listening on PORT", PORT);
});Hit the following Endpoint with a GET Request −
localhost:3000/api/TutorialsPoint/SIMPLY-LEARNING
Output
C:\home
ode>> node reqParams.js Server listening on PORT 3000 Name : TutorialsPoint TagLine : SIMPLY-LEARNING
Updated on: 29-Jan-2022
7K+ Views
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