Cookies are data, stored in small text files, on your computer.
When a web server has sent a web page to a browser, the connection is shut down, and the server forgets everything about the user.
Cookies were invented to solve the problem "how to remember information about the user":
- When a user visits a web page, his/her name can be stored in a cookie.
- Next time the user visits the page, the cookie "remembers" his/her name.
Cookies are saved in name-value pairs like:
username = John Doe
document.cookie = "username=John Doe";
var x = document.cookie;
document.cookie will return all cookies in one string much like: cookie1=value; cookie2=value; cookie3=value;
Deleting a cookie is very simple.You don't have to specify a cookie value when you delete a cookie.Just set the expires parameter to a past date:
document.cookie = "username=; expires=Thu, 01 Jan 1970 00:00:00 UTC; path=/;";
You should define the cookie path to ensure that you delete the right cookie.
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