Learn About Cookies

Cookies are small pieces of data stored on the user's computer by the web browser while browsing a website. They are used to remember information about the user, such as login status, preferences, and other session-related data. Here are some key concepts about cookies that a user should learn:

• Setting a Cookie:
  • Cookies are set using the document.cookie property in JavaScript.
  • A cookie consists of a name-value pair, and optionally, attributes like expiration date, path, domain, and secure flag.
• Expiration Date:
  • Cookies can have an expiration date, after which they are automatically deleted by the browser.
  • If no expiration date is set, the cookie is considered a session cookie and is deleted when the browser is closed.
• Path Attribute:
  • The path attribute specifies the URL path that must exist in the requested URL for the browser to send the cookie header.
  • By default, the path is set to the current document location.
• Reading a Cookie:
  • Cookies can be read using document.cookie, which returns all cookies in a single string.
  • Parsing this string is necessary to extract individual cookie values.
• Deleting a Cookie:
  • To delete a cookie, set its expiration date to a past date.