Changelog for #2145

updated conditional expression

changelog.txt

@@ -18,6 +18,7 @@ OPENSEADRAGON CHANGELOG
 * Fixed an issue where full page mode wouldn't grow properly if you resized the window (#2100 @TanukiSharp)
 * Tile cache keys are now generated by the tile source, so it's easier to override them as needed (#2138 @Aiosa)
 * Now if you pass an error handler into makeAjaxRequest, it doesn't report errors into the console (#2142 @Aiosa)
+* Fixed error caused by attaching MouseTracker to the page's document element (#2145 @tdiprima)
 
 3.0.0:
 

src/openseadragon.js

@@ -1986,7 +1986,7 @@ function OpenSeadragon( options ){
          */
         setElementPointerEvents: function( element, value ) {
             element = $.getElement( element );
-            if ( typeof element.style.pointerEvents !== 'undefined' ) {
+            if (typeof element.style !== 'undefined' && typeof element.style.pointerEvents !== 'undefined' ) {
                 element.style.pointerEvents = value;
             }
         },