typs.js
// checks if obj is a boolean
checks if obj is a boolean
checks if obj is a boolean
bool () {
		return this.add((obj) => {
			return typeof obj === 'boolean' || obj instanceof Boolean;
		});
	}
bool ( ) { return this . add ( ( obj ) => { return typeof obj === 'boolean' || obj instanceof Boolean ; } ) ; }
checks if obj is a boolean
checks if obj is a boolean