Is there some kind of language, being a client, but so that the code is not visible from the client side?

Question

client-server

Hello! I understand that it sounds crazy, but I need to generate an m3u playlist on the client side using a link. That is, when a client is listening to a radio station, some work is going on in the m3u file at that time. At the same time, all this is given to the forces of the client, and not the server.
Roughly speaking, I need an m3u file with a script, but not different from a regular m3u in code.
Example as php. The browser does not see the code, but only the work done. But unlike php, to process it, not the server. Is this even possible?