cosmetical tweaks to postmessage plugin

hakimel · hakimel · commit 87591d95d18b · 2012-11-10T17:15:11.000-05:00
diff --git a/plugin/postmessage/example.html b/plugin/postmessage/example.html
@@ -0,0 +1,39 @@
+<html>
+	<body>
+
+		<iframe id="reveal" src="../../index.html" style="border: 0;" width="500" height="500"></iframe>
+
+		<div>
+			<input id="back" type="button" value="go back"/>
+			<input id="ahead" type="button" value="go ahead"/>
+			<input id="slideto" type="button" value="slideto 2-2"/>
+		</div>
+
+		<script>
+
+			(function (){
+
+				var back = document.getElementById( 'back' ),
+						ahead = document.getElementById( 'ahead' ),
+						slideto = document.getElementById( 'slideto' ),
+						reveal =  window.frames[0];
+
+					back.addEventListener( 'click', function () {
+						
+					reveal.postMessage( JSON.stringify({method: 'prev', args: []}), '*' );
+				}, false );
+
+				ahead.addEventListener( 'click', function (){
+					reveal.postMessage( JSON.stringify({method: 'next', args: []}), '*' );
+				}, false );
+
+				slideto.addEventListener( 'click', function (){
+					reveal.postMessage( JSON.stringify({method: 'slide', args: [2,2]}), '*' );
+				}, false );
+
+			}());
+
+		</script>
+
+	</body>
+</html>
diff --git a/plugin/postmessage/iframe_example.html b/plugin/postmessage/iframe_example.html
diff --git a/plugin/postmessage/postmessage.js b/plugin/postmessage/postmessage.js
@@ -1,39 +1,41 @@
 /*
-simple postmessage plugin
 
-Useful when a reveal slideshow is inside an iframe.
-It allows to call reveal methods from outside.
+	simple postmessage plugin
 
-Example:
-   var reveal =  window.frames[0];
+	Useful when a reveal slideshow is inside an iframe.
+	It allows to call reveal methods from outside.
 
-   // Reveal.prev(); 
-   reveal.postMessage(JSON.stringify({method: 'prev', args: []}), '*');
-   // Reveal.next(); 
-   reveal.postMessage(JSON.stringify({method: 'next', args: []}), '*');
-   // Reveal.slide(2, 2); 
-   reveal.postMessage(JSON.stringify({method: 'slide', args: [2,2]}), '*');
+	Example:
+		 var reveal =  window.frames[0];
 
-Add to the slideshow:
+		 // Reveal.prev(); 
+		 reveal.postMessage(JSON.stringify({method: 'prev', args: []}), '*');
+		 // Reveal.next(); 
+		 reveal.postMessage(JSON.stringify({method: 'next', args: []}), '*');
+		 // Reveal.slide(2, 2); 
+		 reveal.postMessage(JSON.stringify({method: 'slide', args: [2,2]}), '*');
 
-	dependencies: [
-        ...
-		{ src: 'plugin/postmessage/postmessage.js', async: true, condition: function() { return !!document.body.classList; } }
-	]
+	Add to the slideshow:
 
+		dependencies: [
+			...
+			{ src: 'plugin/postmessage/postmessage.js', async: true, condition: function() { return !!document.body.classList; } }
+		]
 
 */
 
 (function (){
 
-window.addEventListener("message", function (event){
-    var data = JSON.parse(event.data),
-        method = data.method,
-        args = data.args;
-    if (Reveal[method]){
-        Reveal[method].apply(Reveal, data.args);
-    }
-}, false);
+	window.addEventListener( "message", function ( event ) {
+		var data = JSON.parse( event.data ),
+				method = data.method,
+				args = data.args;
+
+		if( typeof Reveal[method] === 'function' ) {
+			Reveal[method].apply( Reveal, data.args );
+		}
+	}, false);
+
 }());
 
 
