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a javascript developer's guide to browser cookies

cookies are small pieces of data that websites store on a user's computer. they're a fundamental technology for web development, enabling features like session management, personalization, and tracking. this tutorial provides a comprehensive guide to working with cookies in javascript, covering their creation, reading, updating, and deletion.

*1. understanding cookies:*

cookies consist of key-value pairs, often including attributes like expiration date, domain, and path. they're transmitted between the browser and the server with every http request, allowing the server to identify returning users and tailor their experience.

*key:* a unique identifier for the cookie data.
*value:* the data associated with the key.
*expires:* specifies when the cookie expires. if omitted, it's a session cookie, deleted when the browser closes.
*path:* specifies the url path for which the cookie is valid.
*domain:* specifies the domain for which the cookie is valid.
*secure:* indicates that the cookie should only be transmitted over https.
*httponly:* prevents client-side javascript from accessing the cookie, enhancing security.
*samesite:* controls whether the cookie is sent with cross-site requests. helps mitigate csrf attacks. common values: `strict`, `lax`, `none`.

*2. setting cookies with javascript:*

javascript doesn't directly manipulate cookies using built-in objects. instead, you manipulate the `document.cookie` property, a string representation of all cookies. to set a cookie, you construct a string with the key-value pair and optional attributes.



*important note on `httponly` and `secure`:* while you can include `httponly` and `secure` in the cookie string, javascript cannot set `httponly`. the `httponly` attribute must be set by the server when the cookie is initially created. the `secure` attribute is only effective if the connection is https. including these f ...

#JavaScript #BrowserCookies #windows
javascript developer
browser cookies
cookie management
web development
client-side storage
session cookies
persistent cookies
cookie security
cookie consent
HTTP cookies
JavaScript APIs
cross-domain cookies
browser compatibility
web application security
user tracking