Is-boolean Packages

Is this value a JS Boolean? This module works cross-realm/iframe, and despite ES6 @@toStringTag.

Utilities to get and check variable types (isString, isPlainObject, isRegExp, etc)

A very limited subset of is-* functions I use every day

Is this value not a JS Boolean? This module works cross-realm/iframe, and despite ES6 @@toStringTag.

List of all javascript types. Used and useful for checking, validation, sanitizing and testing. Like isStream, isPromise, isWeakset and etc.

Check does the given Javascript Object is a boolean.

Extended functions for defining and converting data types.

Type check in TypeScript

Check if the parameter is boolean

ESNext type checker.

Simple and light-weight JavaScript type checker that brings convenience!

Check your types at runtime with ESNext syntax by meta programing in node.js and browser with interfaces, strict object and more.

Check does the given Javascript Object is a boolean.

A lightweight tool to check variable types and other logical checks