From 3a98c4ab27d6a5c2934a90804a5e2bdcdeea6d91 Mon Sep 17 00:00:00 2001
From: Oleg Gaidarenko <markelog@gmail.com>
Date: Fri, 13 Nov 2015 14:59:25 +0300
Subject: [PATCH] Revert "Offset: Fix .offset() to correctly work with
 ShadowDOM"

This reverts commit 1617479fcf7cbdaf33dc9334ed10a0f30bf14687.
---
 src/offset.js       | 42 +++++++++++++++++-------------------------
 test/unit/offset.js |  6 +++---
 2 files changed, 20 insertions(+), 28 deletions(-)

diff --git a/src/offset.js b/src/offset.js
index 857b3a5cc..acc41997a 100644
--- a/src/offset.js
+++ b/src/offset.js
@@ -32,7 +32,7 @@ jQuery.offset = {
 			elem.style.position = "relative";
 		}
 
-		curOffset = curElem.offset() || { top: 0, left: 0 };
+		curOffset = curElem.offset();
 		curCSSTop = jQuery.css( elem, "top" );
 		curCSSLeft = jQuery.css( elem, "left" );
 		calculatePosition = ( position === "absolute" || position === "fixed" ) &&
@@ -77,41 +77,33 @@ jQuery.fn.extend( {
 		if ( arguments.length ) {
 			return options === undefined ?
 				this :
-				this.each( function( i ) {
+				this.each(function( i ) {
 					jQuery.offset.setOffset( this, options, i );
-				} );
+				});
 		}
 
-		var docElem, win, rect,
+		var docElem, win,
 			elem = this[ 0 ],
+			box = { top: 0, left: 0 },
 			doc = elem && elem.ownerDocument;
 
-		if ( !elem ) {
+		if ( !doc ) {
 			return;
 		}
 
-		// Support: IE<=11+
-		// Running getBoundingClientRect on a
-		// disconnected node in IE throws an error
-		if ( !elem.getClientRects().length ) {
-			return { top: 0, left: 0 };
+		docElem = doc.documentElement;
+
+		// Make sure it's not a disconnected DOM node
+		if ( !jQuery.contains( docElem, elem ) ) {
+			return box;
 		}
 
-		rect = elem.getBoundingClientRect();
-
-		// Make sure element is not hidden (display: none) or disconnected
-		if ( rect.width || rect.height || elem.getClientRects().length ) {
-			win = getWindow( doc );
-			docElem = doc.documentElement;
-
-			return {
-				top: rect.top + win.pageYOffset - docElem.clientTop,
-				left: rect.left + win.pageXOffset - docElem.clientLeft
-			};
-		}
-
-		// Return zeros for disconnected and hidden elements (gh-2310)
-		return rect;
+		box = elem.getBoundingClientRect();
+		win = getWindow( doc );
+		return {
+			top: box.top + win.pageYOffset - docElem.clientTop,
+			left: box.left + win.pageXOffset - docElem.clientLeft
+		};
 	},
 
 	position: function() {
diff --git a/test/unit/offset.js b/test/unit/offset.js
index a4822e4a9..ea2c26606 100644
--- a/test/unit/offset.js
+++ b/test/unit/offset.js
@@ -57,7 +57,7 @@ QUnit.test( "object without getBoundingClientRect", function( assert ) {
 	assert.equal( result.left, 0, "Check left" );
 });
 
-QUnit.test( "disconnected element", function( assert ) {
+QUnit.test( "disconnected node", function( assert ) {
 	assert.expect( 2 );
 
 	var result = jQuery( document.createElement( "div" ) ).offset();
@@ -65,8 +65,8 @@ QUnit.test( "disconnected element", function( assert ) {
 	// These tests are solely for master/compat consistency
 	// Retrieving offset on disconnected/hidden elements is not officially
 	// valid input, but will return zeros for back-compat
-	assert.equal( result.top, 0, "Retrieving offset on disconnected elements returns zeros (gh-2310)" );
-	assert.equal( result.left, 0, "Retrieving offset on disconnected elements returns zeros (gh-2310)" );
+	equal( result.top, 0, "Check top" );
+	equal( result.left, 0, "Check left" );
 } );
 
 QUnit.test( "hidden (display: none) element", function( assert ) {