Client only cookies - cookie which doesn't ever go to the server
cookies, html, javascript, jquery, session-cookies
Solution
If browser compatibility is a concern you can use a some javascript to wrap around various different technologies. Older versions of IE support (supprise supprise) a proprietary version of localstorage called userData (I don't think it's exactly the same, but should do what you need).
A wrapper script like https://github.com/andris9/jStorage or https://github.com/marcuswestin/store.js should do what you need it to do.
Problem
I want to store user-clicked data in a cookie which never has to go to the server. Its like a session-added data, which I want to persist over sessions, as in the data just keeps adding to the cookie, and it is stored for a long time, and only gets deleted when the user removes browsing history. The cookie is pure-client only cookie and it never has to go the server, as I don't need the user generated data at the server, so I want to get rid of the additional overhead the cookie creates in sending back and forth between browser and server. Is it possible to achieve this?