isBoolean - Node documentation
function isBoolean

Usage in Deno

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.

const util = require('node:util');

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

Parameters

object: unknown

Return Type

object is boolean