expressjsHow can I make an XHR request using Express.js?

An XHR request can be made using Express.js by using the express.json() middleware. This middleware will parse the body of the request and make it available in the req.body object.

Example code

const express = require('express');
const app = express();

// Parse request body as JSON
app.use(express.json());

// Make an XHR request
app.post('/data', (req, res) => {
  // req.body will contain the parsed JSON data
  console.log(req.body);
  res.send('Success!');
});

app.listen(3000);

Output example

Success!

The code consists of the following parts:

• const express = require('express') - imports the express module
• const app = express() - creates an instance of an Express application
• app.use(express.json()) - adds the express.json() middleware to the application, which will parse the body of the request as JSON
• app.post('/data', (req, res) => {...}) - adds a POST endpoint to the application, which will be called when an XHR request is made to the /data endpoint
• console.log(req.body) - logs the parsed JSON data from the request body to the console
• res.send('Success!') - sends a response back to the client

Helpful links

• Express.js documentation

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