diff --git a/src/attributes/attr.js b/src/attributes/attr.js
index facdd411a..b627fe888 100644
--- a/src/attributes/attr.js
+++ b/src/attributes/attr.js
@@ -1,11 +1,10 @@
 define([
 	"../core",
 	"../var/rnotwhite",
-	"../var/strundefined",
 	"../core/access",
 	"./support",
 	"../selector"
-], function( jQuery, rnotwhite, strundefined, access, support ) {
+], function( jQuery, rnotwhite, access, support ) {
 
 var nodeHook, boolHook,
 	attrHandle = jQuery.expr.attrHandle;
@@ -33,7 +32,7 @@ jQuery.extend({
 		}
 
 		// Fallback to prop when attributes are not supported
-		if ( typeof elem.getAttribute === strundefined ) {
+		if ( !elem.getAttribute ) {
 			return jQuery.prop( elem, name, value );
 		}
 
diff --git a/src/attributes/classes.js b/src/attributes/classes.js
index c6178246b..c8d1393f0 100644
--- a/src/attributes/classes.js
+++ b/src/attributes/classes.js
@@ -1,10 +1,9 @@
 define([
 	"../core",
 	"../var/rnotwhite",
-	"../var/strundefined",
 	"../data/var/dataPriv",
 	"../core/init"
-], function( jQuery, rnotwhite, strundefined, dataPriv ) {
+], function( jQuery, rnotwhite, dataPriv ) {
 
 var rclass = /[\t\r\n\f]/g;
 
@@ -128,7 +127,7 @@ jQuery.fn.extend({
 				}
 
 			// Toggle whole class name
-			} else if ( type === strundefined || type === "boolean" ) {
+			} else if ( value === undefined || type === "boolean" ) {
 				if ( this.className ) {
 					// store className if set
 					dataPriv.set( this, "__className__", this.className );
diff --git a/src/core/init.js b/src/core/init.js
index e49196a96..50f310c56 100644
--- a/src/core/init.js
+++ b/src/core/init.js
@@ -101,7 +101,7 @@ var rootjQuery,
 		// HANDLE: $(function)
 		// Shortcut for document ready
 		} else if ( jQuery.isFunction( selector ) ) {
-			return typeof rootjQuery.ready !== "undefined" ?
+			return rootjQuery.ready !== undefined ?
 				rootjQuery.ready( selector ) :
 				// Execute immediately if ready is not present
 				selector( jQuery );
diff --git a/src/event.js b/src/event.js
index 7336f4d9b..6183f703d 100644
--- a/src/event.js
+++ b/src/event.js
@@ -1,6 +1,5 @@
 define([
 	"./core",
-	"./var/strundefined",
 	"./var/rnotwhite",
 	"./var/hasOwn",
 	"./var/slice",
@@ -10,7 +9,7 @@ define([
 	"./core/init",
 	"./data/accepts",
 	"./selector"
-], function( jQuery, strundefined, rnotwhite, hasOwn, slice, support, dataPriv ) {
+], function( jQuery, rnotwhite, hasOwn, slice, support, dataPriv ) {
 
 var
 	rkeyEvent = /^key/,
@@ -72,7 +71,7 @@ jQuery.event = {
 			eventHandle = elemData.handle = function( e ) {
 				// Discard the second event of a jQuery.event.trigger() and
 				// when an event is called after a page has unloaded
-				return typeof jQuery !== strundefined && jQuery.event.triggered !== e.type ?
+				return typeof jQuery !== "undefined" && jQuery.event.triggered !== e.type ?
 					jQuery.event.dispatch.apply( elem, arguments ) : undefined;
 			};
 		}
diff --git a/src/exports/global.js b/src/exports/global.js
index 6513287c6..1db41449d 100644
--- a/src/exports/global.js
+++ b/src/exports/global.js
@@ -1,7 +1,9 @@
 define([
-	"../core",
-	"../var/strundefined"
-], function( jQuery, strundefined ) {
+	"../core"
+], function( jQuery ) {
+
+/* exported noGlobal */
+/* global   noGlobal: false */
 
 var
 	// Map over jQuery in case of overwrite
@@ -25,7 +27,7 @@ jQuery.noConflict = function( deep ) {
 // Expose jQuery and $ identifiers, even in AMD
 // (#7102#comment:10, https://github.com/jquery/jquery/pull/557)
 // and CommonJS for browser emulators (#13566)
-if ( typeof noGlobal === strundefined ) {
+if ( !noGlobal ) {
 	window.jQuery = window.$ = jQuery;
 }
 
diff --git a/src/offset.js b/src/offset.js
index cc6ffb401..fa51f1803 100644
--- a/src/offset.js
+++ b/src/offset.js
@@ -1,6 +1,5 @@
 define([
 	"./core",
-	"./var/strundefined",
 	"./core/access",
 	"./css/var/rnumnonpx",
 	"./css/curCSS",
@@ -10,7 +9,7 @@ define([
 	"./core/init",
 	"./css",
 	"./selector" // contains
-], function( jQuery, strundefined, access, rnumnonpx, curCSS, addGetHookIf, support ) {
+], function( jQuery, access, rnumnonpx, curCSS, addGetHookIf, support ) {
 
 var docElem = window.document.documentElement;
 
@@ -99,7 +98,7 @@ jQuery.fn.extend({
 
 		// Support: BlackBerry 5, iOS 3 (original iPhone)
 		// If we don't have gBCR, just use 0,0 rather than error
-		if ( typeof elem.getBoundingClientRect !== strundefined ) {
+		if ( elem.getBoundingClientRect !== undefined ) {
 			box = elem.getBoundingClientRect();
 		}
 		win = getWindow( doc );
diff --git a/src/var/strundefined.js b/src/var/strundefined.js
deleted file mode 100644
index 04e16b03e..000000000
--- a/src/var/strundefined.js
+++ /dev/null
@@ -1,3 +0,0 @@
-define(function() {
-	return typeof undefined;
-});