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Function: tryCatchAsync()

Call Signature​

tryCatchAsync<T>(fn): Promise<Validation<T, unknown>>

Defined in: validation/constructors/index.ts:258

Async version of tryCatch.

Wraps a potentially rejecting Promise in a Validation.

Type Parameters​

T​

T

Parameters​

fn​

() => Promise<T>

Async function that may throw

Returns​

Promise<Validation<T, unknown>>

Promise of Validation containing either the return value or error

Example​

// Fetch with validation
const fetchUser = async (id: string): Promise<Validation<User, unknown>> =>
  tryCatchAsync(() => fetch(`/api/users/${id}`).then(r => r.json()))

// With error mapping
const fetchUser = async (id: string): Promise<Validation<User, string>> =>
  tryCatchAsync(
    () => fetch(`/api/users/${id}`).then(r => r.json()),
    (e) => `Failed to fetch user: ${e}`
  )

Call Signature​

tryCatchAsync<T, E>(fn, mapError): Promise<Validation<T, E>>

Defined in: validation/constructors/index.ts:283

Async version of tryCatch with error mapping.

Type Parameters​

T​

T

E​

E

Parameters​

fn​

() => Promise<T>

Async function that may throw

mapError​

(error) => E

Function to transform the caught error

Returns​

Promise<Validation<T, E>>

Promise of Validation containing either the return value or mapped error

Example​

// Real-world: API call with validation
const createUser = async (data: unknown): Promise<Validation<User, string>> =>
  pipe(
    await tryCatchAsync(
      () => fetch('/api/users', {
        method: 'POST',
        body: JSON.stringify(data)
      }).then(r => r.json()),
      (e) => `Network error: ${e}`
    ),
    flatMap(validateUserData)
  )