From 3925d1cb14b7f6125480612e46c9e08cbdf64c95 Mon Sep 17 00:00:00 2001
From: accraze <accraze@gmail.com>
Date: Tue, 22 Dec 2015 16:55:08 -0800
Subject: [PATCH 1/2] fixed tabIndex to handle empty string

chrome acts buggy and jumps when tabindex is not set to empty string.

fixes #769
---
 src/viewer.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/viewer.js b/src/viewer.js
index 6dfa5c7c..165938c5 100644
--- a/src/viewer.js
+++ b/src/viewer.js
@@ -234,7 +234,7 @@ $.Viewer = function( options ) {
         style.left     = "0px";
     }(this.canvas.style));
     $.setElementTouchActionNone( this.canvas );
-    this.canvas.tabIndex = options.tabIndex || 0;
+    this.canvas.tabIndex = options.tabIndex || 0 || "" ;
 
     //the container is created through applying the ControlDock constructor above
     this.container.className = "openseadragon-container";

From a3f0216ad7ace858a02f29bffb48a519b381686e Mon Sep 17 00:00:00 2001
From: accraze <accraze@gmail.com>
Date: Wed, 6 Jan 2016 20:00:38 -0800
Subject: [PATCH 2/2] Added tabIndex to default to zero

empty string is also accepted as well.
---
 src/viewer.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/viewer.js b/src/viewer.js
index 165938c5..723a4b65 100644
--- a/src/viewer.js
+++ b/src/viewer.js
@@ -234,7 +234,7 @@ $.Viewer = function( options ) {
         style.left     = "0px";
     }(this.canvas.style));
     $.setElementTouchActionNone( this.canvas );
-    this.canvas.tabIndex = options.tabIndex || 0 || "" ;
+    this.canvas.tabIndex = (options.tabIndex === undefined ? 0 : options.tabIndex);
 
     //the container is created through applying the ControlDock constructor above
     this.container.className = "openseadragon-container";