isNil

Problem

You need to check for both null and undefined in one guard — for example cleaning form values or skipping empty API fields.

Solution

Use isNil(value) to check value === null || value === undefined.

import { isNil } from '@vielzeug/arsenal';

isNil(null); // true
isNil(undefined); // true
isNil(0); // false
isNil(''); // false

Related

• isDefined
• isEmpty