Clarify whether API is using native promises or just a similar when/then interface

[netpoetica]

Throughout the document, I have not found anything that clearly states whether the when/then API of fetch() is just defined as such for readability, or if fetch() requests are promises. I was also expecting to see the request class extend some sort of thenable interface, but it looks like it's a standalone object.

[domenic]

The fetch() method is defined here: https://fetch.spec.whatwg.org/#globalfetch

You are looking at the examples.

[netpoetica]

Thanks - I made the mistake of searching the doc for "promises" and not "promise" - appreciated