disable transition into and out of overview mode #829

css/reveal.css

@@ -1103,9 +1103,7 @@ body {
 
 
 .reveal.fade.overview .slides section,
-.reveal.fade.overview .slides>section>section,
-.reveal.fade.overview-deactivating .slides section,
-.reveal.fade.overview-deactivating .slides>section>section {
+.reveal.fade.overview .slides>section>section {
 	-webkit-transition: none;
 	   -moz-transition: none;
 	        transition: none;
@@ -1155,6 +1153,12 @@ body {
 	cursor: pointer;
 	background: rgba(0,0,0,0.1);
 }
+.reveal.overview .slides section,
+.reveal.overview-deactivating .slides section {
+	-webkit-transition: none !important;
+	   -moz-transition: none !important;
+	        transition: none !important;
+}
 .reveal.overview .slides section .fragment {
 	opacity: 1;
 }

js/reveal.js

@@ -151,12 +151,6 @@ var Reveal = (function(){
 		// Delays updates to the URL due to a Chrome thumbnailer bug
 		writeURLTimeout = 0,
 
-		// A delay used to activate the overview mode
-		activateOverviewTimeout = 0,
-
-		// A delay used to deactivate the overview mode
-		deactivateOverviewTimeout = 0,
-
 		// Flags if the interaction event listeners are bound
 		eventsAreBound = false,
 
@@ -1238,14 +1232,6 @@ var Reveal = (function(){
 			dom.wrapper.classList.add( 'overview' );
 			dom.wrapper.classList.remove( 'overview-deactivating' );
 
-			clearTimeout( activateOverviewTimeout );
-			clearTimeout( deactivateOverviewTimeout );
-
-			// Not the pretties solution, but need to let the overview
-			// class apply first so that slides are measured accurately
-			// before we can position them
-			activateOverviewTimeout = setTimeout( function() {
-
 			var horizontalSlides = document.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR );
 
 			for( var i = 0, len1 = horizontalSlides.length; i < len1; i++ ) {
@@ -1298,8 +1284,6 @@ var Reveal = (function(){
 				} );
 			}
 
-			}, 10 );
-
 		}
 
 	}
@@ -1313,9 +1297,6 @@ var Reveal = (function(){
 		// Only proceed if enabled in config
 		if( config.overview ) {
 
-			clearTimeout( activateOverviewTimeout );
-			clearTimeout( deactivateOverviewTimeout );
-
 			dom.wrapper.classList.remove( 'overview' );
 
 			// Temporarily add a class so that transitions can do different things
@@ -1323,7 +1304,7 @@ var Reveal = (function(){
 			// moving from slide to slide
 			dom.wrapper.classList.add( 'overview-deactivating' );
 
-			deactivateOverviewTimeout = setTimeout( function () {
+			setTimeout( function () {
 				dom.wrapper.classList.remove( 'overview-deactivating' );
 			}, 1 );