Files
30-seconds-of-code/snippets/isUndefined.md
Angelos Chalaris 611729214a Snippet format update
To match the starter (for the migration)
2019-08-13 10:29:12 +03:00

315 B

title, tags
title tags
isUndefined type,beginner

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

Use the strict equality operator to check if the value and of val are equal to undefined.

const isUndefined = val => val === undefined;
isUndefined(undefined); // true