Loading a reactjs page?

Question

React

Hello.

I develop SPA on ReactJs. I want to implement a loading system, when you go to another page and while it is loading on the page that you were displayed by the loader until that page is loaded. I hope I explained clearly.

Example:


Using React.lazy and Suspense ( More )

What is this type of loading called?
Tell me how to implement?

Thanks in advance everyone!