HttpRequestBody type
Types of bodies supported on the request. NodeJS.ReadableStream and () => NodeJS.ReadableStream is Node only. Blob, ReadableStream, and () => ReadableStream are browser only.
type HttpRequestBody = NodeJS.ReadableStream | () => NodeJS.ReadableStream | ReadableStream<Uint8Array> | () => ReadableStream<Uint8Array> | Blob | ArrayBuffer | ArrayBufferView | FormData | string | null