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javascript cookies: a comprehensive guide (geeksforgeeks style)

cookies are small pieces of data stored in a user's web browser while browsing a website. they're used to remember information about the user, such as login details, preferences, and shopping cart items. think of them as a small notepad that a website can leave on your computer to remember details about your interaction. this tutorial will delve into the world of javascript cookies, exploring their functionality, syntax, usage, and potential security considerations.

*why use cookies?*

*session management:* maintain user sessions, track logins, and remember user preferences.
*personalization:* customize content based on user preferences, such as language or location.
*tracking:* track user behavior across a website for analytics and targeted advertising (though this is becoming increasingly regulated).
*shopping carts:* store items in a shopping cart as users browse an e-commerce site.
*targeted advertising:* track user behavior across websites for targeted advertising.

*cookie basics*

*storage:* cookies are stored as text files in the user's browser.
*size limit:* most browsers enforce a limit of around 4kb per cookie.
*domain association:* cookies are usually associated with a specific domain. a website can only access cookies it has created or cookies created by a subdomain of the site.
*expiration:* cookies can be set to expire after a certain time or when the browser is closed.
*javascript access:* javascript can read, write, and delete cookies. this tutorial will primarily focus on using javascript to manipulate cookies.

*the `document.cookie` property*

the primary way javascript interacts with cookies is through the `document.cookie` property. this property allows you to both read existing cookies and set new ones.

*reading cookies:* `document.cookie` returns a string containing a semicolon-separated list of all co ...

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JavaScript
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GeeksforGeeks
Web Development
Client-Side Storage
HTTP Cookies
Browser Cookies
Session Management
Cookie Manipulation
JavaScript Tutorial
Frontend Development
Web Security
User Session
Cookie Expiration
JavaScript Programming