Setting Cookies in Node.js with Express Framework: A Step-by-Step Guide

├Źndice
  1. Introduction
  2. Step 1: Install Express
  3. Step 2: Import Express
  4. Step 3: Create an Express Application
  5. Step 4: Set a Cookie
  6. Step 5: Retrieve a Cookie
  7. Conclusion

Introduction

When building web applications, cookies are a useful way to store user data in the browser. In Node.js, you can use the Express framework to set and manage cookies. In this step-by-step guide, we will go over how to set cookies in Node.js with the Express framework.

Step 1: Install Express

The first step is to install the Express framework. You can do this by running the following command in your terminal:

npm install express

Step 2: Import Express

Next, you will need to import Express into your project. You can do this by adding the following line of code at the top of your JavaScript file:

const express = require('express');

Step 3: Create an Express Application

After importing Express, you will need to create an Express application. You can do this by adding the following line of code:

const app = express();

Now that you have an Express application, you can set a cookie. You can do this by using the `res.cookie()` method. Here is an example:

app.get('/', (req, res) => {
  res.cookie('username', 'John Doe');
  res.send('Cookie has been set');
});

This code sets a cookie with the name `username` and the value `John Doe`. The cookie is set when the user visits the root path (`/`).

To retrieve a cookie, you can use the `req.cookies` object. Here is an example:

app.get('/', (req, res) => {
  const username = req.cookies.username;
  res.send('Hello ' + username);
});

This code retrieves the `username` cookie and displays a message with the value of the cookie.

Conclusion

Setting cookies in Node.js with the Express framework is easy and straightforward. By following these steps, you can set and retrieve cookies in your Node.js web application. Remember to always set cookies securely and only store necessary information.

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