@@ -457,7 +457,9 @@ var Reveal = (function(){
else {
element.style.background = data.background;
}
+ }
+ if( data.background || data.backgroundColor || data.backgroundImage ) {
element.setAttribute( 'data-background-hash', data.background + data.backgroundSize + data.backgroundImage + data.backgroundColor + data.backgroundRepeat + data.backgroundPosition + data.backgroundTransition );