Core: Move safeActiveElement into its own module

Ref #9647

ui/autocomplete.js

@@ -23,11 +23,12 @@
 		define( [
 			"jquery",
 			"./core",
+			"./version",
 			"./keycode",
 			"./widget",
 			"./position",
-			"./version",
-			"./menu"
+			"./menu",
+			"./safe-active-element"
 		], factory );
 	} else {
 

ui/core.js

@@ -29,6 +29,7 @@
 			"./labels",
 			"./jquery-1-7",
 			"./plugin",
+			"./safe-active-element",
 			"./version"
 		], factory );
 	} else {
@@ -40,35 +41,6 @@
 
 $.extend( $.ui, {
 
-	// Internal use only
-	safeActiveElement: function( document ) {
-		var activeElement;
-
-		// Support: IE 9 only
-		// IE9 throws an "Unspecified error" accessing document.activeElement from an <iframe>
-		try {
-			activeElement = document.activeElement;
-		} catch ( error ) {
-			activeElement = document.body;
-		}
-
-		// Support: IE 9 - 11 only
-		// IE may return null instead of an element
-		// Interestingly, this only seems to occur when NOT in an iframe
-		if ( !activeElement ) {
-			activeElement = document.body;
-		}
-
-		// Support: IE 11 only
-		// IE11 returns a seemingly empty object in some cases when accessing
-		// document.activeElement from an <iframe>
-		if ( !activeElement.nodeName ) {
-			activeElement = document.body;
-		}
-
-		return activeElement;
-	},
-
 	// Internal use only
 	safeBlur: function( element ) {
 

ui/dialog.js

@@ -22,7 +22,7 @@
 		// AMD. Register as an anonymous module.
 		define( [
 			"jquery",
-			"./core",
+			"./version",
 			"./keycode",
 			"./widget",
 			"./button",
@@ -31,7 +31,7 @@
 			"./mouse",
 			"./position",
 			"./resizable",
-			"./version"
+			"./safe-active-element"
 		], factory );
 	} else {
 

ui/draggable.js

@@ -24,6 +24,7 @@
 			"./data",
 			"./mouse",
 			"./plugin",
+			"./safe-active-element",
 			"./version",
 			"./widget"
 		], factory );

ui/menu.js

@@ -25,8 +25,9 @@
 			"./core",
 			"./version",
 			"./keycode",
-			"./widget",
-			"./position"
+			"./position",
+			"./safe-active-element",
+			"./widget"
 		], factory );
 	} else {
 

ui/safe-active-element.js

@@ -0,0 +1,40 @@
+( function( factory ) {
+	if ( typeof define === "function" && define.amd ) {
+
+		// AMD. Register as an anonymous module.
+		define( [ "jquery", "./version" ], factory );
+	} else {
+
+		// Browser globals
+		factory( jQuery );
+	}
+} ( function( $ ) {
+return $.ui.safeActiveElement = function( document ) {
+	var activeElement;
+
+	// Support: IE 9 only
+	// IE9 throws an "Unspecified error" accessing document.activeElement from an <iframe>
+	try {
+		activeElement = document.activeElement;
+	} catch ( error ) {
+		activeElement = document.body;
+	}
+
+	// Support: IE 9 - 11 only
+	// IE may return null instead of an element
+	// Interestingly, this only seems to occur when NOT in an iframe
+	if ( !activeElement ) {
+		activeElement = document.body;
+	}
+
+	// Support: IE 11 only
+	// IE11 returns a seemingly empty object in some cases when accessing
+	// document.activeElement from an <iframe>
+	if ( !activeElement.nodeName ) {
+		activeElement = document.body;
+	}
+
+	return activeElement;
+};
+
+} ) );

ui/spinner.js

@@ -22,9 +22,9 @@
 		// AMD. Register as an anonymous module.
 		define( [
 			"jquery",
-			"./core",
 			"./version",
 			"./keycode",
+			"./safe-active-element",
 			"./widget",
 			"./button"
 		], factory );

ui/tabs.js

@@ -25,6 +25,7 @@
 			"./core",
 			"./escape-selector",
 			"./keycode",
+			"./safe-active-element",
 			"./version",
 			"./widget"
 		], factory );