Revert "Offset: simplify jQuery#offsetParent method"

timmywil · timmywil · commit 24ada82ce803 · 2016-01-06T14:31:46.000-05:00
This reverts commit 9644757.
diff --git a/src/offset.js b/src/offset.js
@@ -160,24 +160,14 @@ jQuery.fn.extend( {
 		};
 	},
 
-	// This method will return documentElement in the following cases:
-	// 1) For the element inside the iframe without offsetParent, this method will return
-	//    documentElement of the parent window
-	// 2) For the hidden or detached element
-	// 3) For body or html element, i.e. in case of the html node - it will return itself
-	//
-	// but those exceptions were never presented as a real life use-cases
-	// and might be considered as more preferable results.
-	//
-	// This logic, however, is not guaranteed and can change at any point in the future
 	offsetParent: function() {
 		return this.map( function() {
-			var offsetParent = this.offsetParent;
+			var offsetParent = this.offsetParent || docElem;
 
-			while ( offsetParent && jQuery.css( offsetParent, "position" ) === "static" ) {
+			while ( offsetParent && ( !jQuery.nodeName( offsetParent, "html" ) &&
+				jQuery.css( offsetParent, "position" ) === "static" ) ) {
 				offsetParent = offsetParent.offsetParent;
 			}
-
 			return offsetParent || docElem;
 		} );
 	}
