Hello @dotnetic and @Sebi,
Thank you for your quick reply!
@dotnetic I already read the first two posts while I had researched. Very interesting, especially the Vue.js feat. ProcessWire case study.
I'll take a look to the other modules, maybe they will help me to accomplish me needs.
I think you basicly understand the concept:
The page is like an invitation for a Christmas-Party or similar events. The customer can modify some party of the invitation like background image or font-color and can publich the SPA with their own configs.
Ok, that was my initial idea. There shouldn't be any probleme that one customer can see the other pages if he edit his invitaition if I hable the right correct, right?
No, it doesn't have to be headless at all, just steped over the "new and modern" headless CMS approches.
Maybe the mentioned way will cover all my needs.