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JavaScript By Example - Cookies
The only way to keep information relating to a site without passing it from page to page to page is to use a cookie. A cookie is also the only way to keep information between browser sessions.
Cookies: 1. Write A Session Cookie
A session cookie keeps data until the browser is closed.
Cookies: 2. Write A First Party Cookie
First party cookies are kept until the expiry date/time is reached.
Cookies: 3. Domain Level Cookies
Specifying a domain allows a cookie to be shared with all the sub-domains of that domain.
Cookies: 4. Folder Specific Cookies
Cookies that are specific to a folder cannot be accessed from outside that folder.
Cookies: 5. Flexible Cookie Writing
We can combine the various cookie writing options together to create a single function that can handle alternatives for writing cookies.
Cookies: 6. Replacing A Cookie
You can replace a cookie simply by writing another cookie with the same name.
Cookies: 7. Deleting A Cookie
The code we use to write cookies can also be used to delete them.
Cookies: 8. Reading Cookies
All the cookies are supplied to the page when it first loads. All we need to do is to extract the individual cookies.
Cookies: 9. Updating Cookies
The difference between replacing and updating a cookie is that in updating a cookie we first need to read the current value stored there.