function isNull Usageimport { isNull } from "node:util"; DeprecatedSince v4.0.0 - Use value === null instead. isNull(object: unknown): object is null Returns true if the given object is strictly null. Otherwise, returnsfalse. Returns true if the given object is strictly null. Otherwise, returnsfalse. const util = require('node:util'); util.isNull(0); // Returns: false util.isNull(undefined); // Returns: false util.isNull(null); // Returns: true Parameters object: unknown Return Type object is null