Representational state transfer
The project and database Open Domesday - by Anna Powell-Smith and the CCT Clamping websites use the RESTfull API (Anytime API)
At the present time I am not sure how this really helps in the development of a website or the maintenance of a database. I have used "State Machine" architecture in the past and while this was perhaps useful at the time it was not easy to debug and maintain. The description below from Wikipedia seems to be ovrly general and really states that designs should be "good".
What Wikipedia says about REST:
Clear as mud!
Looking at my pages and analysis of Arrow Functions with respect to asynchronous API calls (Fetch API and ipify API) I see that there is still much to learn.