is-boolean

Predicate that returns true for boolean values.

Install

npm install is-boolean

Usage

var isBoolean = require('is-boolean');
 
console.log(isBoolean(false)); // true
console.log(isBoolean(true)); // true
console.log(isBoolean(new Boolean(1))); // true
console.log(isBoolean(!!'foo')); // true
console.log(isBoolean(!'foo')); // true
console.log(isBoolean('')); // false
console.log(isBoolean([])); // false
console.log(isBoolean(0)); // false
console.log(isBoolean(null)); // false
console.log(isBoolean(undefined)); // false
console.log(isBoolean(1)); // false
console.log(isBoolean({})); // false
console.log(isBoolean(function() {})); // false
console.log(isBoolean(/foo/gi)); // false
console.log(isBoolean(NaN)); // false

License

MIT