Can’t use type with responseType option

[sunknudsen]

Describe the bug

• Node.js version: v12.14.1
• OS & version: macOS Mojave 10.14.6

Actual behavior

I believe this issue is a TypeScript type declaration bug.

I am building on top of got and having issues with the responseType option.

Expected behavior

The following code block should not throw type error.

Code to reproduce

import got from "got"

export type ResponseType = "text" | "json" | "buffer"

const send = async function(responseType: ResponseType) {
  console.log(await got({
    url: "https://api.example.net",
    method: "GET",
    responseType: responseType
  }))
}

Checklist

• I have read the documentation.
• I have tried my code with the latest version of Node.js and Got.

[sindresorhus]

What is the type error?

[sunknudsen]

@sindresorhus

The last overload gave the following error.
  Argument of type '{ method: Method; url: string; searchParams: string; json: { [key: string]: any; }; headers: Headers; responseType: ResponseType; hooks: { beforeRequest: (() => Promise<void>)[]; beforeRetry: ((options: NormalizedOptions, error: GeneralError, retryCount: number) => Promise<...>)[]; }; }' is not assignable to parameter of type 'string | Merge<Merge<RequestOptions, Merge<GotOptions, URLOptions>>, { isStream: true; }>'.
    Type '{ method: Method; url: string; searchParams: string; json: { [key: string]: any; }; headers: Headers; responseType: ResponseType; hooks: { beforeRequest: (() => Promise<void>)[]; beforeRetry: ((options: NormalizedOptions, error: GeneralError, retryCount: number) => Promise<...>)[]; }; }' is not assignable to type 'Merge<Merge<RequestOptions, Merge<GotOptions, URLOptions>>, { isStream: true; }>'.
      Property 'isStream' is missing in type '{ method: Method; url: string; searchParams: string; json: { [key: string]: any; }; headers: Headers; responseType: ResponseType; hooks: { beforeRequest: (() => Promise<void>)[]; beforeRetry: ((options: NormalizedOptions, error: GeneralError, retryCount: number) => Promise<...>)[]; }; }' but required in type '{ isStream: true; }'.

[szmarczak]

Possibly a duplicate of #954