parameter in FormData doesn't match MDN reference

[r3wt]

https://developer.mozilla.org/en-US/docs/Web/API/FormData/set

The field's value. This can be a string or Blob (including subclasses such as File). If none of these are specified the value is converted to a string.

wouldn't it then be string|Blob|{ toString(): string }?

[saschanaz]

toString exists everywhere so that's effectively any, which we don't want. I think historically TypeScript guided for explicit toString() in such case.

[HolgerJeromin]

Ref: https://github.com/microsoft/TypeScript/issues/38347