preventing all scroll events was not such an impressive idea after all...

Author: bartaz

js/impress.js

@@ -190,6 +190,16 @@
             return false;
         }
 
+        // Sometimes it's possible to trigger focus on first link with some keyboard action.
+        // Browser in such a case tries to scroll the page to make this element visible
+        // (even that body overflow is set to hidden) and it breaks our careful positioning.
+        //
+        // So, as a lousy (and lazy) workaround we will make the page scroll back to the top
+        // whenever slide is selected
+        //
+        // If you are reading this and know any better way to handle it, I'll be glad to hear about it!
+        window.scrollTo(0, 0);
+        
         var step = el.stepData;
 
         if ( $(".step.active", impress) ) {
@@ -296,17 +306,6 @@
         select( getElementFromUrl() );
     }, false);
 
-    // Sometimes it's possible to trigger focus on first link with some keyboard action.
-    // Browser in such a case tries to scroll the page to make this element visible
-    // (even that body overflow is set to hidden) and it breaks our careful positioning.
-    //
-    // So, as a lousy (and lazy) workaround any scroll event will make the page scroll back to the top.
-    //
-    // If you are reading this and know any better way to handle it, I'll be glad to hear about it!
-    window.addEventListener("scroll", function ( event ) {
-        window.scrollTo(0, 0);
-    }, false);
-    
     // START 
     // by selecting step defined in url or first step of the presentation
     select(getElementFromUrl() || steps[0]);