How to display the full text of a Popup post?

Question

WordPress

Good afternoon.
Help who knows on this issue.
I am writing a product catalog website.
On the catalog page, the products themselves go, and when you click, in order not to go to a new page with a full description, you need to display everything in a modal window.
I decided to use magnific Popup to display a modal window.
It has a beautiful thing like Ajax Type . But so far I can’t figure out how to display exactly the post that was clicked on there.
Thanks in advance!