tryError API Documentation v0.0.1-alpha.1

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tryError API Documentation / tryMapAsync

Function: tryMapAsync()

function tryMapAsync<T, U, E>(
  resultPromise,
  mapper
): Promise<TryResult<U, TryError<string> | E>>;

Defined in: async.ts:197

Transform a successful async result, leaving errors unchanged

Type Parameters

T

T

U

U

E

E extends TryError<string>

Parameters

resultPromise

Promise<TryResult<T, E>>

Promise of TryResult to transform

mapper

(value) => Promise<U>

Async function to transform the success value

Returns

Promise<TryResult<U, TryError<string> | E>>

Promise of transformed result or original error

Example

const fetchResult = tryAsync(() => fetch("/api/user"));
const jsonResult = await tryMapAsync(fetchResult, async (response) =>
  response.json()
);