Is there any danger to creating UUID in Javascript client-side?

Question

I need to generate UUID to eventually store in a database. Can I generate theses UUID from Javascript on the client browser (There are some examples here)?

Is there any security risk of doing it this way? I understand that anyone can modify the UUID before it's passed to the server for storing. So i'll need to check if they are trully unique before storing them in the database, but other than that, is there any other things to checkout?

(Sorry for my english, feel free to correct any grammar errors)

edit: To answer questions about why I would want to do this, it's because I can create a new object and it's identifier in Javascript and add it to my view and then make an AJAX call to the server to add it to the database. This way, I don't need to load it back from the database to know what is it's primary identifier.

Answer 1

Not really. As long as it's a simple identifier and nothing more, and you are indeed checking it for validity and uniqueness, it's no different than user accounts having an id in the url, for example.

Look at your URL bar. I bet 1296234 is the primary key of this question, but I can't really do anything with that information. Same deal with your script.