npm install express cookie-parser --save

var cookieParser = require('cookie-parser');
const app = express();
app.use(cookieParser());

res.cookie(name_of_cookie, value_of_cookie);

let express = require('express');
let cookieParser = require('cookie-parser');
//setup express app
let app = express()

app.use(cookieParser());


//basic route for homepage
app.get('/', (req, res)=>{
res.send('Request Response');
});

//JSON object to be added to cookie
let users = {
name : "Sana",
Age : "2"
}

//Route for adding cookie
app.get('/setuser', (req, res)=>{
res.cookie("userData", users);
res.send('Set user data in cookie');
});

//Iterate users data from cookie
app.get('/getuser', (req, res)=>{
//shows all the cookies
res.send(req.cookies);
});

//server listens to port 3000
app.listen(3000, (err)=>{
if(err)
throw err;
console.log('listening on port 3000');
});

res.cookie(cookie_name, 'cookie_value', {expire: 300000 + Date.now()});

//It also expires after 360000 ms from the time it is set.
res.cookie(cookie_name, 'cookie_value', {maxAge: 360000});

We can add several attributes to make this cookie more secure.

HTTPonly ensures that a cookie is not accessible using the JavaScript code. This is the most crucial form of protection against cross-scripting attacks.

A secure attribute ensures that the browser will reject cookies unless the connection happens over HTTPS.

app.get('/setcookie', (req, res) => {
res.cookie(`Cookie_name`,`Cookie_Value`,{
maxAge: 5000,
// expires works the same as the maxAge
expires: new Date('01 12 2021'),
secure: true,
httpOnly: true,
sameSite: 'lax'
// sameSite = Strict
});
res.send('Cookie have been saved successfully');
});

app.get('/deletecookie', (req, res) => {
//show the saved cookies
res.clearCookie()
res.send('Cookie has been deleted successfully');
});

npm install express cookie-parser --save

const express = require('express');
const cookieParser = require('cookie-parser');
const app = express();

// APPLYING AS MIDDLEWARE
app.use(cookieParser());

app.get('/', (req, res) => {

let cookieVal = req.cookies.username;
let show;

if (cookieVal) {
show = `Hi ${cookieVal} <br><a href="/delete-cookie">Delete Cookie</a>`;
} else {
show = `<a href="/set-cookie">Set Cookie</a><br>
<a href="/delete-cookie">Delete Cookie</a><br>`;
}

res.send(show);
});

// SET COOKIE
app.get('/set-cookie', (req, res) => {
res.cookie('username', 'Webtutorials.ME', {
maxAge: 1000 * 60, // 1 min
httpOnly: true // http only, prevents JavaScript cookie access
});
// REDIRECT OT HOME
res.redirect('/');
});

// DELETE COOKIE
app.get('/delete-cookie', (req, res) => {
//DELETING username COOKIE
res.clearCookie('username');
// REDIRECT OT HOME
res.redirect('/');

});

app.listen(3000, () => console.log('Your app listening on port 3000'));