meaningPromiseOrThrow

Returns a function that passes through meaningful data or throws an error. Data is considered meaningless if it is null, undefined, empty string, empty object, or empty array.

Available since v1.0.0

Import

import { meaningPromiseOrThrow } from '@helpers4/promise';
// or, from the all-in-one package (same code, one install):
import { meaningPromiseOrThrow } from 'helpers4/promise';

Signature

meaningPromiseOrThrow<T>(error: string): function

Parameters

Parameter	Type	Description
error	string	The error message to throw if data is meaningless

Returns

function — A function that returns the data if meaningful, or throws

Examples

Pass through meaningful values

Returns the value if it is not empty (null, undefined, empty string, empty object, empty array).

Promise.resolve({ key: 'value' }).then(meaningPromiseOrThrow('No data'))
// => { key: 'value' }

Throw on empty values

Throws when the value is null, undefined, empty string, empty object, or empty array.

Promise.resolve({}).then(meaningPromiseOrThrow('Empty!'))
// throws Error('Empty!')

Source

View source on GitHub