Introduction to Cookies in JavaScript
Cookies are small pieces of data stored in a user's browser that help websites remember user preferences, session details, and authentication status. JavaScript allows developers to set, retrieve, and manage cookies efficiently.

How Cookies Work
A cookie consists of a name-value pair along with optional attributes such as expiration date, path, and domain. Once set, the browser automatically sends the cookie with every request to the specified domain set cookie js.

Setting a Cookie in JavaScript
To set a cookie in JavaScript, the document.cookie property is used. A cookie can be assigned with a specific key-value pair, and additional attributes such as expires or path can be added to control its behavior.

Adding an Expiration Date
By default, cookies are deleted when the session ends. To make a cookie persistent, an expiration date must be specified using the expires or max-age attribute. This ensures that the cookie remains stored for a defined period.

Setting a Cookie for a Specific Path and Domain
Cookies can be restricted to a specific path or domain. This is useful when different sections of a website need separate cookie management. The path attribute specifies where the cookie is accessible, while the domain attribute defines which subdomains can use it.

Ensuring Security with Secure and HttpOnly Flags
To enhance security, the Secure flag ensures that cookies are transmitted only over HTTPS. The HttpOnly flag prevents JavaScript from accessing the cookie, protecting it from client-side attacks such as cross-site scripting.

Managing and Updating Cookies
Once a cookie is set, it can be modified by assigning a new value to the same key. If an expiration date is changed, the browser updates the cookie accordingly. Removing a cookie requires setting its expiration date to a past time.

Conclusion
Cookies play a crucial role in web development by enabling persistent user sessions and preferences. Understanding how to set and manage cookies effectively helps improve user experience while maintaining security and compliance with modern web standards.