Build: A more modest block-level function proposal

This reverts commit fa610da.

Author: gibson042

Gruntfile.js

@@ -186,7 +186,6 @@ module.exports = function( grunt ) {
 					banner: "/*! jQuery v<%= pkg.version %> | " +
 						"(c) jQuery Foundation | jquery.org/license */",
 					compress: {
-						"if_return": false,
 						"hoist_funs": false,
 						loops: false,
 						unused: false

src/css/support.js

@@ -6,24 +6,6 @@ define( [
 ], function( jQuery, document, documentElement, support ) {
 
 ( function() {
-	var pixelPositionVal, boxSizingReliableVal, pixelMarginRightVal, reliableMarginLeftVal,
-		container = document.createElement( "div" ),
-		div = document.createElement( "div" );
-
-	// Finish early in limited (non-browser) environments
-	if ( !div.style ) {
-		return;
-	}
-
-	// Support: IE <=9 - 11 only
-	// Style of cloned element affects source element cloned (#8908)
-	div.style.backgroundClip = "content-box";
-	div.cloneNode( true ).style.backgroundClip = "";
-	support.clearCloneStyle = div.style.backgroundClip === "content-box";
-
-	container.style.cssText = "border:0;width:8px;height:0;top:0;left:-9999px;" +
-		"padding:0;margin-top:1px;position:absolute";
-	container.appendChild( div );
 
 	// Executing both pixelPosition & boxSizingReliable tests require only one layout
 	// so they're executed at the same time to save the second computation.
@@ -61,6 +43,25 @@ define( [
 		div = null;
 	}
 
+	var pixelPositionVal, boxSizingReliableVal, pixelMarginRightVal, reliableMarginLeftVal,
+		container = document.createElement( "div" ),
+		div = document.createElement( "div" );
+
+	// Finish early in limited (non-browser) environments
+	if ( !div.style ) {
+		return;
+	}
+
+	// Support: IE <=9 - 11 only
+	// Style of cloned element affects source element cloned (#8908)
+	div.style.backgroundClip = "content-box";
+	div.cloneNode( true ).style.backgroundClip = "";
+	support.clearCloneStyle = div.style.backgroundClip === "content-box";
+
+	container.style.cssText = "border:0;width:8px;height:0;top:0;left:-9999px;" +
+		"padding:0;margin-top:1px;position:absolute";
+	container.appendChild( div );
+
 	jQuery.extend( support, {
 		pixelPosition: function() {
 			computeStyleTests();