Express.js – req.xhr Property

The req.xhr property is a Boolean property that returns True when the request's X-Requested-With header field is "XMLHttpRequest". The True pointer basically indicates that the request was issued by a client library such as jQuery.

Syntax

req.xhr

Example 1

Create a file with the name "reqXhr.js" and copy the following code snippet. After creating the file, use the command "node reqXhr.js" to run this code as shown in the example below −

// req.xhr Property Demo Example

// Importing the express module
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', function (req, res) {
   console.log("Xhr is: ", req.xhr);
   res.send(req.xhr);
});
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

Output

C:\home\node>> node reqXhr.js
Server listening on PORT 3000
Xhr is: false

Example 2

Let's take a look at one more example.

// req.xhr Property Demo Example

// Importing the express module
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', function (req, res) {
   console.log("Xhr is: ", req.xhr);
   res.send(req.xhr);
});
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 −

http://localhost:3000/api

and set the following headers −

X-Requested-With = XMLHttpRequest

Output

C:\home\node>> node reqXhr.js
Server listening on PORT 3000
Xhr is: true