Fix #12229, size/consistency improvements. Close gh-887.

src/ajax.js

-var // Document location
-	ajaxLocation,
-	// Document location segments
+var
+	// Document location
 	ajaxLocParts,
+	ajaxLocation,
 
 	rhash = /#.*$/,
 	rheaders = /^(.*?):[ \t]*([^\r\n]*)\r?$/mg, // IE leaves an \r character at EOL
@@ -518,7 +518,7 @@ jQuery.extend({
 
 			// Set data for the fake xhr object
 			jqXHR.status = status;
-			jqXHR.statusText = "" + ( nativeStatusText || statusText );
+			jqXHR.statusText = ( nativeStatusText || statusText ) + "";
 
 			// Success/Error
 			if ( isSuccess ) {
@@ -578,14 +578,11 @@ jQuery.extend({
 		// Extract dataTypes list
 		s.dataTypes = jQuery.trim( s.dataType || "*" ).toLowerCase().split( core_rspace );
 
-		// Determine if a cross-domain request is in order
+		// A cross-domain request is in order when we have a protocol:host:port mismatch
 		if ( s.crossDomain == null ) {
-			parts = rurl.exec( s.url.toLowerCase() );
-			s.crossDomain = !!( parts &&
-				( parts[ 1 ] != ajaxLocParts[ 1 ] || parts[ 2 ] != ajaxLocParts[ 2 ] ||
-					( parts[ 3 ] || ( parts[ 1 ] === "http:" ? 80 : 443 ) ) !=
-						( ajaxLocParts[ 3 ] || ( ajaxLocParts[ 1 ] === "http:" ? 80 : 443 ) ) )
-			);
+			parts = rurl.exec( s.url.toLowerCase() ) || false;
+			s.crossDomain = parts && ( parts.join(":") + ( parts[ 3 ] ? "" : parts[ 1 ] === "http:" ? 80 : 443 ) ) !==
+				( ajaxLocParts.join(":") + ( ajaxLocParts[ 3 ] ? "" : ajaxLocParts[ 1 ] === "http:" ? 80 : 443 ) );
 		}
 
 		// Convert data if not already a string

src/attributes.js

@@ -57,7 +57,7 @@ jQuery.fn.extend({
 						setClass = " " + elem.className + " ";
 
 						for ( c = 0, cl = classNames.length; c < cl; c++ ) {
-							if ( !~setClass.indexOf( " " + classNames[ c ] + " " ) ) {
+							if ( setClass.indexOf( " " + classNames[ c ] + " " ) < 0 ) {
 								setClass += classNames[ c ] + " ";
 							}
 						}
@@ -90,7 +90,7 @@ jQuery.fn.extend({
 					// loop over each item in the removal list
 					for ( c = 0, cl = removes.length; c < cl; c++ ) {
 						// Remove until there is nothing to remove,
-						while ( className.indexOf(" " + removes[ c ] + " ") > -1 ) {
+						while ( className.indexOf(" " + removes[ c ] + " ") >= 0 ) {
 							className = className.replace( " " + removes[ c ] + " " , " " );
 						}
 					}
@@ -144,7 +144,7 @@ jQuery.fn.extend({
 			i = 0,
 			l = this.length;
 		for ( ; i < l; i++ ) {
-			if ( this[i].nodeType === 1 && (" " + this[i].className + " ").replace(rclass, " ").indexOf( className ) > -1 ) {
+			if ( this[i].nodeType === 1 && (" " + this[i].className + " ").replace(rclass, " ").indexOf( className ) >= 0 ) {
 				return true;
 			}
 		}
@@ -322,7 +322,7 @@ jQuery.extend({
 				return ret;
 
 			} else {
-				elem.setAttribute( name, "" + value );
+				elem.setAttribute( name, value + "" );
 				return value;
 			}
 
@@ -586,7 +586,7 @@ if ( !jQuery.support.style ) {
 			return elem.style.cssText.toLowerCase() || undefined;
 		},
 		set: function( elem, value ) {
-			return ( elem.style.cssText = "" + value );
+			return ( elem.style.cssText = value + "" );
 		}
 	};
 }

src/core.js

@@ -559,7 +559,7 @@ jQuery.extend({
 	},
 
 	nodeName: function( elem, name ) {
-		return elem.nodeName && elem.nodeName.toUpperCase() === name.toUpperCase();
+		return elem.nodeName && elem.nodeName.toLowerCase() === name.toLowerCase();
 	},
 
 	// args is for internal usage only
@@ -616,7 +616,7 @@ jQuery.extend({
 		function( text ) {
 			return text == null ?
 				"" :
-				text.toString().replace( rtrim, "" );
+				( text + "" ).replace( rtrim, "" );
 		},
 
 	// results is for internal usage only
@@ -762,7 +762,7 @@ jQuery.extend({
 		};
 
 		// Set the guid of unique handler to the same of original handler, so it can be removed
-		proxy.guid = fn.guid = fn.guid || proxy.guid || jQuery.guid++;
+		proxy.guid = fn.guid = fn.guid || jQuery.guid++;
 
 		return proxy;
 	},

src/data.js

@@ -6,7 +6,7 @@ jQuery.extend({
 
 	deletedIds: [],
 
-	// Please use with caution
+	// Remove at next major release (1.9/2.0)
 	uuid: 0,
 
 	// Unique for each copy of jQuery on the page
@@ -58,7 +58,7 @@ jQuery.extend({
 			// Only DOM nodes need a new unique ID for each element since their data
 			// ends up in the global cache
 			if ( isNode ) {
-				elem[ internalKey ] = id = jQuery.deletedIds.pop() || ++jQuery.uuid;
+				elem[ internalKey ] = id = jQuery.deletedIds.pop() || jQuery.guid++;
 			} else {
 				id = internalKey;
 			}
@@ -232,7 +232,7 @@ jQuery.fn.extend({
 					for ( l = attr.length; i < l; i++ ) {
 						name = attr[i].name;
 
-						if ( name.indexOf( "data-" ) === 0 ) {
+						if ( !name.indexOf( "data-" ) ) {
 							name = jQuery.camelCase( name.substring(5) );
 
 							dataAttr( elem, name, data[ name ] );

src/event.js

@@ -365,7 +365,7 @@ jQuery.event = {
 		var i, j, cur, ret, selMatch, matched, matches, handleObj, sel, related,
 			handlers = ( (jQuery._data( this, "events" ) || {} )[ event.type ] || []),
 			delegateCount = handlers.delegateCount,
-			args = [].slice.call( arguments ),
+			args = core_slice.call( arguments ),
 			run_all = !event.exclusive && !event.namespace,
 			special = jQuery.event.special[ event.type ] || {},
 			handlerQueue = [];
@@ -966,7 +966,7 @@ jQuery.fn.extend({
 	},
 	undelegate: function( selector, types, fn ) {
 		// ( namespace ) or ( selector, types [, fn] )
-		return arguments.length == 1? this.off( selector, "**" ) : this.off( types, selector || "**", fn );
+		return arguments.length === 1 ? this.off( selector, "**" ) : this.off( types, selector || "**", fn );
 	},
 
 	trigger: function( type, data ) {