Error
assertNotNull

fallback

Asserts a value is not null or undefined

Import

import { fallback } from '@fullstacksjs/toolbox';

Signature

function assertNotNull<T>(value: Nullable<T>, error: string = 'Value is required'): asserts value is NonNullable<T> {}

Examples

assertNotNull(null, 'WTF')      // Throw 'WTF'
assertNotNull(undefined, 'WTF') // Throw 'WTF'
assertNotNull(true)             // noop
assertthrowErr