isBoolean - util - Node

isBoolean - util - Node documentation

function isBoolean

import { isBoolean } from "node:util";



isBoolean(object: unknown): object is boolean

Deprecated

Since v4.0.0 - Use typeof value === 'boolean' instead.

Returns true if the given object is a Boolean. Otherwise, returns false.

import util from 'node:util';

util.isBoolean(1);
// Returns: false
util.isBoolean(0);
// Returns: false
util.isBoolean(false);
// Returns: true

Parameters



object: unknown

object is boolean