30-seconds-of-code/snippets/isNil.md

title, tags

title	tags
isNil	type,beginner

Returns true if the specified value is null or undefined, false otherwise.

• Use the strict equality operator to check if the value of val is equal to null or undefined.

const isNil = val => val === undefined || val === null;

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