Function unwrapErr

unwrapErr<E>(err: Promise<Err<E>>): Promise<E>

Get the error value from an Err result.

const result = err("error");
const error: string = unwrapErr(result); // "error"

const result = Promise.resolve(err("error"));
const error: Promise<string> = unwrapErr(result); // Promise<"error">

unwrapErr<E>(err: Err<E>): E

Get the error value from an Err result.

const result = err("error");
const error: string = unwrapErr(result); // "error"

const result = Promise.resolve(err("error"));
const error: Promise<string> = unwrapErr(result); // Promise<"error">