1 files changed, 22 insertions, 2 deletions
diff --git a/plugin/notes/notes.html b/plugin/notes/notes.html
index e368a5f..5b75d73 100644
--- a/plugin/notes/notes.html
+++ b/plugin/notes/notes.html
@@ -427,10 +427,17 @@
 				 * Forward keyboard events to the current slide window.
 				 * This enables keyboard events to work even if focus
 				 * isn't set on the current slide iframe.
+				 *
+				 * Block F5 default handling, it reloads and disconnects
+				 * the speaker notes window.
 				 */
 				function setupKeyboard() {
 
 					document.addEventListener( 'keydown', function( event ) {
+						if( event.keyCode === 116 || ( event.metaKey && event.keyCode === 82 ) ) {
+							event.preventDefault();
+							return false;
+						}
 						currentSlide.contentWindow.postMessage( JSON.stringify({ method: 'triggerKey', args: [ event.keyCode ] }), '*' );
 					} );
 
@@ -675,7 +682,7 @@
 					document.body.setAttribute( 'data-speaker-layout', value );
 
 					// Persist locally
-					if( window.localStorage ) {
+					if( supportsLocalStorage() ) {
 						window.localStorage.setItem( 'reveal-speaker-layout', value );
 					}
 
@@ -687,7 +694,7 @@
 				 */
 				function getLayout() {
 
-					if( window.localStorage ) {
+					if( supportsLocalStorage() ) {
 						var layout = window.localStorage.getItem( 'reveal-speaker-layout' );
 						if( layout ) {
 							return layout;
@@ -701,6 +708,19 @@
 
 				}
 
+				function supportsLocalStorage() {
+
+					try {
+						localStorage.setItem('test', 'test');
+						localStorage.removeItem('test');
+						return true;
+					}
+					catch( e ) {
+						return false;
+					}
+
+				}
+
 				function zeroPadInteger( num ) {
 
 					var str = '00' + parseInt( num );