Type assertions aka less-broken typeof.
var type = require('type');
var obj = new Date;
if (type(obj) == 'date') ...type(new Date) == 'date'
type({}) == 'object'
type(null) == 'null'
type(undefined) == 'undefined'
type("hey") == 'string'
type(true) == 'boolean'
type(false) == 'boolean'
type(12) == 'number'
type(type) == 'function'
type(/asdf/) == 'regexp'
type((function(){ return arguments })()) == 'arguments'
type([]) == 'array'
type(document.createElement('div')) == 'element'
type(NaN) == 'nan'
type(new Error('Ups! Something wrong...')) == 'error'MIT