isNullish

A function that checks if the given argument is null or undefined, and if so, narrows the argument type to undefined | null.

Interface

typescript

const isNullish: <T>(val: T | null | undefined) => val is null | undefined

Usage

import { isNullish } from '@devgrace/utils';

isNullish(undefined); // true
isNullish(null); // true

isNullish(1); // false
isNullish(false); // false
isNullish("str"); // false
isNullish({}); // false