Express.js res.status() Function

The res.status() function set the HTTP status for the response. It is a chainable alias of Node’s response.statusCode. 

Syntax:

res.status( code )

Parameter: This function accepts a single parameter code that holds the HTTP status code. 

Return Value: It returns an Object. 

Installation of the express module:

1. You can visit the link to Install the express module. You can install this package by using this command.

npm install express

2. After installing the express module, you can check your express version in the command prompt using the command.

npm version express

3. After that, you can create a folder and add a file, for example, index.js. To run this file you need to run the following command.

node index.js

Project Structure:

Example 1: Filename: index.js

javascript

const express = require('express');
const app = express();
const PORT = 3000;

// Without middleware
app.get('/user', function (req, res) {
    res.status(200).send("User Page");
})

app.listen(PORT, function (err) {
    if (err) console.log(err);
    console.log("Server listening on PORT", PORT);
});

Steps to run the program:

Run the index.js file using the below command:

node index.js

Output:

Server listening on PORT 3000

Now open the browser and go to http://localhost:3000/user, on your screen and you will see the following output:

Browser output:

User Page

Example 2: Filename: index.js

javascript

const express = require('express');
const path = require('path');
const app = express();
const PORT = 3000;

//with middleware
app.use('/', function (req, res, next) {
    res.status(200).send("Status Working");
    next();
});

app.get('/', function (req, res) {
    console.log("Home Page!")
    res.send();
});

app.listen(PORT, function (err) {
    if (err) console.log(err);
    console.log("Server listening on PORT", PORT);
});

Steps to run the program:

Run the index.js file using the below command:

node index.js

Output:

Console Output:

Now open the browser and go to http://localhost:3000/, now check your console and you will see the following output:

Server listening on PORT 3000
Home Page!

Browser Output:

And you will see the following output on your browser screen:

Status Working

Reference: https://expressjs.com/en/5x/api.html#res.status