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.

Check if the parameter is boolean

Type check in TypeScript

ESNext type checker.

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

A lightweight tool to check variable types and other logical checks

Check does the given Javascript Object is a boolean.

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