What can ReactJS be friends with for SPA development without a backend in the usual sense?

Question

React

I mean, with what you can make a SPA without backing for example PHP, Java, etc.
If you know any manuals, I will be grateful if you give a link.

Answer 1

firebase

Answer 2

I will also add mockapi

Answer 3

With node and express + mongo/mysql/postresql.
You can hardcode all content into arrays/objects right in the components (lol).
There is also firebase - you can do the whole CRUD within the framework.