The behavior of Buffer’s methods with an empty fill has not been documented. #45727

Affected URL(s)

https://nodejs.org/api/buffer.html

Description of the problem

What happens when Buffer’s methods are called with the fill argument that is empty (a string, Buffer, array, et cetera.), has not been documented in Node.js 19.2.0’s documentation.

I’ve confirmed that Buffer.alloc(…, "", "UTF-8") and buffer.fill("") fill the Buffer with zero, which is expected but undocumented behavior.

I’m not talking about the indexOf or lastIndexOf methods.