Variable fromReadonly

Type declaration

• • <F extends (...args: any[]) => Promise<any>, E extends unknown = Error>(
        fn: F,
        mapErr?: (err: unknown) => E,
    ): ResultAsyncFn<F, E>

  • Wraps an async function to return a ResultAsync instead of throwing errors.

    Type Parameters

    • F extends (...args: any[]) => Promise<any>

      The async function type.
    • E extends unknown = Error

      The type of the error.

    Parameters

    • fn: F

      The async function to wrap.
    • mapErr: (err: unknown) => E = defaultErrorMapper

      A function to map errors to a specific type.

    Returns ResultAsyncFn<F, E>

    An async function that returns a ResultAsync.

    Example

    const safeFetch = fromAsyncThrowable(fetch);
    
    const [error, response] = await safeFetch("https://api.example.com/data");
    if (error) {
      console.error(error.message);
    } else {
      const data = await response.json();
      console.log(data);
    }
    Copy