In the case of stateless service, a large number of values need to be passed between pages, is there a good solution?

what webapp, does is because the business logic is relatively complex, and the server is a stateless service (session, etc., cannot be used to store page data), pages are nested with each other, and it is complex to process data back and forth. Now, in order to get data conveniently, all pages are written on the same page, ready to be presented in the way of pop-up layer or iframe. In this case, the logic of a page is too complex and I think iframe is too low, on the mobile. Want to know if there is another way or a good framework to reopen all pages and easily access data from multiple pages?
the simplified structure of the page is as follows:

clipboard.png

Mar.11,2021

corresponds through a key in redis .

Menu