From 914f9e8a64c22a88d230fcb0014ea97f92998d3a Mon Sep 17 00:00:00 2001
From: Joel Steres <joel@ymobility.com>
Date: Sun, 4 Dec 2016 23:25:54 -0700
Subject: [PATCH] Introduce a hidden element as a reference for zoom
 computation

Rather than rely on the change in body position to compute the mobile
zoom compensation introduce a hidden, absolutely position element whose
offset can be measured.  The body element can be offset due to vertical
margin collapse even when the element itself is positioned at the
origin. When this happens the body offset measurements become unreliable.
---
 src/utility.js | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/utility.js b/src/utility.js
index 703644ab..9b51be91 100644
--- a/src/utility.js
+++ b/src/utility.js
@@ -212,8 +212,20 @@ function countFlags(value) {
  * positioned at 0,0.
  */
 function activateChromeZoomedOffsetPatch() {
+	var style;
 	if (/Chrome\/[.0-9]*/.test(navigator.userAgent)) {
 		session.chromePatchRefElement = $(document.body);
+		style = {
+			top: 0,
+			left: 0,
+			position: 'absolute',
+			display: 'hidden',
+			height: '1px',
+			margin: 0,
+			width: '1px',
+			zIndex: -1
+		};
+		session.chromePatchRefElement = $('<div/>').css(style).appendTo($(document.body));
 	}
 }