Difference between Cookies, localStorage, and sessionStorage in Web Development

In web development, Cookies, localStorage, and sessionStorage are used for storing data locally in the user's browser. However, there are some key differences between them:

Cookies

Cookies are small pieces of data stored in the user's browser. They are sent with every HTTP request to the server, which can slow down website performance. Cookies have an expiry date and can store up to 4KB of data.

localStorage

localStorage is similar to cookies but can store larger amounts of data (up to 5MB) and does not have an expiry date. The data stored in localStorage persists even after the browser is closed and reopened.

sessionStorage

sessionStorage is similar to localStorage but the data is only available for the duration of the page session. Once the user closes the tab or window, the data is cleared. sessionStorage can store up to 5MB of data per origin.

Overall, cookies are mainly used for data that needs to be sent to the server with each request, while localStorage and sessionStorage are used for storing larger amounts of data locally on the user's browser.