Patch 1

dist/itype.js

@@ -1,4 +1,4 @@
-(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.itype = f()}})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({"itype":[function(require,module,exports){
+(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.itype = f()}})(function(){var define,module,exports;return (function(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c="function"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error("Cannot find module '"+i+"'");throw a.code="MODULE_NOT_FOUND",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u="function"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}return r})()({"itype":[function(require,module,exports){
 'use strict';
 
 module.exports = new TypeProto();
@@ -31,12 +31,12 @@ function TypeProto() {
         return typeof variable === name;
     }
 
-    ['arrayBuffer', 'file', 'array', 'object']
+    ['null', 'arrayBuffer', 'file', 'array', 'object']
         .forEach(function (name) {
             type[name] = typeOf.bind(null, name);
         });
 
-    ['null', 'string', 'undefined', 'boolean', 'number', 'function']
+    ['string', 'undefined', 'boolean', 'number', 'function']
         .forEach(function (name) {
             type[name] = typeOfSimple.bind(null, name);
         });
@@ -46,4 +46,4 @@ function TypeProto() {
 
 
 },{}]},{},["itype"])("itype")
-});
+});

lib/itype.js

@@ -30,12 +30,12 @@ function TypeProto() {
         return typeof variable === name;
     }
 
-    ['arrayBuffer', 'file', 'array', 'object']
+    ['null', 'arrayBuffer', 'file', 'array', 'object']
         .forEach((name) => {
             type[name] = typeOf.bind(null, name);
         });
 
-    ['null', 'string', 'undefined', 'boolean', 'number', 'function']
+    ['string', 'undefined', 'boolean', 'number', 'function']
         .forEach((name) => {
             type[name] = typeOfSimple.bind(null, name);
         });

test/itype.js

@@ -33,3 +33,23 @@ test('itype.boolean: false', (t) => {
     t.end();
 });
 
+
+test('itype.undefined: true', (t) => {
+    t.ok(itype.undefined(undefined), 'should return true');
+    t.end();
+});
+
+test('itype.undefined: false', (t) => {
+    t.notOk(itype.undefined(null), 'should return false');
+    t.end();
+});
+
+test('itype.null: true', (t) => {
+    t.ok(itype.null(null), 'should return true');
+    t.end();
+});
+
+test('itype.null: false', (t) => {
+    t.notOk(itype.null(undefined), 'should return false');
+    t.end();
+});