null - JavaScript | MDN

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015. Learn moreSee full compatibilityReport feedback

[Itisango]

ypeof null; // "object"; typeof undefined; // "undefined"; null === undefined // false; null == undefined // true; null === null; // true; null == null; // true; !null; // true; isNaN(1 + null); // false; isNaN(1 + undefined); // true”