Without a link to the site in question or screenshots of what you are talking about it is going to be nearly impossible for anyone to help you.
Thank you for comment. I need to disable button “Select” if field Caption is empty…
https://i.ibb.co/TTSpqS6/wp.jpg
That will require custom coding and a custom plugin. I am not sure there is anything that already exists that will do that. It should be possible though.
Any documentations how to get the values from Caption field with JavaScript… I’m tried with jQuery but without success.