How to Create a Session in Javascript?

This blog post will teach you how to create a session in Javascript. You will learn how to set up the session, how to store data in the session, and how to retrieve data from the session.

Checkout this video:


In this article, we will learn how to create a session in JavaScript. A session is a way to store information (in variables) to be used across multiple pages. Unlike a cookie, information stored in a session is not stored on the user’s computer.

What is a session in JavaScript?

In JavaScript, a session is a way to save data on the server while the user is interacting with the website. Sessions are used to store data such as user preferences, login information, and other data that needs to be accessed by the server.

How to create a session in JavaScript?

A session is a time-limited collection of information associated with a single user. Once a user closes their browser, the session is over. Sessions are used to track information about a user as they move from page to page on a website. This information can include items like:

– Username
– Items in a shopping cart
– Settings (like theme or language preferences)

To create a session in JavaScript, you must first create a new Session object:

var session = new Session();

Next, you can add data to the session using the set() method:

session.set(‘username’, ‘jsmith’);
session.set(‘language’, ‘en-us’);
session.set(‘cart’, { item1: ‘shirt’, item2: ‘pants’ });

Finally, you can access data in the session using the get() method: var username = session.get(‘username’); // returns ‘jsmith’

How to store data in a session?

Sessions are a way to store data on the server while a user is accessing a web site or application. When you create a session, you give it a name. You can then store data in that session by setting key/value pairs. When the user is done using the site or application, the session is destroyed and the data is no longer available.

How to retrieve data from a session?

A session is a way to store information (in variables) to be used across multiple pages.

Sessions are useful because they allow you track unique visitors on your website and store information about them as they browse from page to page. This can come in handy, for example, if you want to keep track of what items a person has added to their shopping cart as they move from page to page on your website.

In order for a session to work, the visitor’s browser must have cookies enabled. A cookie is a small piece of data that is stored on the visitor’s computer and contains information about their session.

Sessions are implemented server-side, which means that the session information is stored on the server, not in the visitor’s browser. When a visitor arrives on your website, a new session is created and a cookie is stored on their computer containing a unique session ID. As the visitor moves from page to page, they will send this session ID back to the server with each request. The server will then use this ID to retrieve the data associated with that particular session.

Creating a session in PHP is very easy. The first thing you need to do is call thesession_start() function. This function will start a new session or resume an existing one based on the presence of asession ID cookie.

Once you have calledsession_start(), you can access any data that has been stored in the current session using the $_SESSION superglobal array:

How to delete data from a session?

How to delete data from a session?
To remove all data from a session, you can use the session_unset() function. This function will take all the data from the current session and delete it. However, this function will not destroy the session itself. To remove all data from a session and destroy it, you can use the session_destroy() function.

How to end a session in JavaScript?

To end a session in JavaScript, you can use the built-in function “sessionStorage.clear()”.

Advantages of using sessions in JavaScript

Sessions in JavaScript can be used to store data on the client side. This can be used to save user preferences or track user activity on a website. sessions last for a single page request, meaning that data stored in a session is deleted when the user navigates to another page.

There are several advantages to using sessions in JavaScript:
-Sessions are generally faster than cookies because they don’t have to be read from and written to disk.
-They can be used to store data on the server side, which can be used to track user activity or preferences.
-Data stored in sessions is generally more secure than data stored in cookies because it is not accessible by malicious scripts.

Disadvantages of using sessions in JavaScript

While sessionStorage is useful for storing small amounts of data, it has some disadvantages that you should be aware of:

-Data is only accessible from the current browser tab or window. If you open a new tab or window, the data will not be available.
-The data is not synced across tabs or windows. So if you store data in sessionStorage in one tab, it will not be available in another tab.
-Data is not shared with other domains. So if you have two tabs open, one on your website and one on another website, the sessionStorage data will be different.
-Data is not persistent. If you close the browser or navigate to a different website, the data will be lost.


In conclusion, sessions are an important part of maintaining state in web applications. By using the methods described above, you can easily create and manage session data in your application.

Scroll to Top