Basically, I have a bookmarklet with code in it that I can and want to update later.

Is it possible to make the bookmark update itself if it is out of date? I don't want to force my users to always manually update it.

I have tried to look it up but the results are either chrome extensions adding/updating the bookmark, or just putting javascript in bookmarks, which I already know how to do.

Is it possible to do what I am trying to do? Or do I have to store the main code in localStorage and update that?

(Ignoring the problem about detecting the version and fetching the updated code, I got that covered)