How to generate json correctly if there is a lot of data?

Question

JavaScript

Good afternoon!
Please tell me how to generate json correctly?
The site should come out like this , but there will be much more data and functionality.
In the sidebar, by clicking on an item, the data on the map should be filtered.
The question is to do one json for all this (a couple of thousand large objects) or somehow split the sidebar and the map and filter by a common ID? Or which is better?
The application itself is in react/redux.
I will be grateful for your help!

Answer 1

You can read about the REST API , I think it will also come in handy in the future.