Why does undici use ReadableStream from stream/web if it is a Node library?

[dlarocque]

In Node, there exist different interfaces for ReadableStream:

• node/globals.d.ts seems to implement https://nodejs.org/api/stream.html#class-streamreadable
• node/stream/web.d.ts seems to implement https://developer.mozilla.org/en-US/docs/Web/API/ReadableStream

In undici, we use the web interface here: https://github.com/nodejs/undici/blob/main/types/fetch.d.ts#L7.
Why don't we use the Node interface?

[Ethan-Arrowood]

Fetch is a browser API and Undici implements it as close to specification as possible (meaning it uses Web ReadableStream).

Other methods in Undici use the Node.js Stream Readable.

Node.js has support for many Web Apis (specified by WHATWG or W3C)

[dlarocque]

Thanks for the answer!