Boolean Packages

Joi Schema for boolean expressions

Prune boolean JSON expressions

Flips a coin with a 50/50 chance to return true or false.

A random boolean generator

Convert any type to any type.

Boolean data type has two possible truth values to represent logic.<br>

Boolean data type has two possible truth values to represent logic.<br>

Check if `this` is truthy.

If provided condition is false, throw and error.

Check if a value is an array `Polyfill`

An expressive type testing library

JSON isBoolean method

A jQuery plugin for rendering variables to the DOM. Supports nested objects and arrays.

Returns false if the value of a property is either strictly false, or it's inverse is strictly true.

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

compare the type of your value with one or several types

Tests for truthy values and returns a boolean value. Can take interger, string, or even object values.

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

Utilities library for type checking and other useful things. Already more than 35 functions. Each function returns false or true, that's it. Perfect for front and back ends.

Predicates for JavaScript