Running this or that javascript based on user permissions?

Question

JavaScript

Imagine the situation: if the user under which we entered the site has the right to create records in the database, then when clicking, for example, on some element, js is launched, which in turn launches modal windows, etc.
If the user Does not have rights, then by clicking on the same element those actions do not occur. Something else is happening.
The question arises, how to distinguish between executable javascript for a user who has rights and a user who does not have them?

Answer 1

You form server logic.
Well, for a registered / unregistered user, issue different content (with different content of model windows)