diff --git a/js/small-menu.js b/js/small-menu.js
index d0e5a3cb..28b34306 100644
--- a/js/small-menu.js
+++ b/js/small-menu.js
@@ -1,31 +1,39 @@
+/**
+ * Handles toggling the main navigation menu for small screens.
+ */
 jQuery( document ).ready( function( $ ) {
-	var $browserWidth = $( window ).width();
-	var $masthead = $( '#masthead' );
+	var $masthead = $( '#masthead' ),
+	    timeout = false;
 
 	$.fn.smallMenu = function() {
-		$( $masthead ).find( '.site-navigation' ).removeClass( 'main-navigation' ).addClass( 'main-small-navigation' );
-		$( $masthead ).find( '.site-navigation h1' ).removeClass( 'assistive-text' ).addClass( 'menu-toggle' );
+		$masthead.find( '.site-navigation' ).removeClass( 'main-navigation' ).addClass( 'main-small-navigation' );
+		$masthead.find( '.site-navigation h1' ).removeClass( 'assistive-text' ).addClass( 'menu-toggle' );
 
-		$( '.menu-toggle' ).click( function () {
-			$( $masthead ).find( '.menu' ).toggle();
+		$( '.menu-toggle' ).click( function() {
+			$masthead.find( '.menu' ).toggle();
 			$( this ).toggleClass( 'toggled-on' );
-		});
-	}
+		} );
+	};
 
-	$(window).resize(function() {
-		var $browserWidth = $( window ).width();
-
-		if ( $browserWidth < 600 ) {
-			$.fn.smallMenu();
-		} else {
-			$( $masthead ).find( '.site-navigation' ).removeClass( 'main-small-navigation' ).addClass( 'main-navigation' );
-			$( $masthead ).find( '.site-navigation h1' ).removeClass( 'menu-toggle' ).addClass( 'assistive-text' );
-			$( $masthead ).find( '.menu' ).removeAttr( 'style' );
-		}
-	});
-
-	if ( $browserWidth < 600 ) {
+	// Check viewport width on first load.
+	if ( $( window ).width() < 600 )
 		$.fn.smallMenu();
-	}
 
+	// Check viewport width when user resizes the browser window.
+	$( window ).resize( function() {
+		var browserWidth = $( window ).width();
+
+		if ( false !== timeout )
+			clearTimeout( timeout );
+
+		timeout = setTimeout( function() {
+			if ( browserWidth < 600 ) {
+				$.fn.smallMenu();
+			} else {
+				$masthead.find( '.site-navigation' ).removeClass( 'main-small-navigation' ).addClass( 'main-navigation' );
+				$masthead.find( '.site-navigation h1' ).removeClass( 'menu-toggle' ).addClass( 'assistive-text' );
+				$masthead.find( '.menu' ).removeAttr( 'style' );
+			}
+		}, 200 );
+	} );
 } );
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