It’s fair that you don’t want to continue.
You’re clearly confusing a front-end service to a back-end one. Playground itself does not do anything that you are saying. Your front-end service doesn’t either. Playgrounds does not do any sort of business logic
My service is written in ReactJS, and then uses Kotlin with a sprinkle of Python in the back-end. Very hip, I know.
I would not say that my ReactJS web app does anything that you’re saying playground does. I would say that my back-end server manages of all that. Regardless, playground doesn’t even have these capabilities.