1 files changed, 42 insertions, 0 deletions
diff --git a/plugin/postmessage/postmessage.js b/plugin/postmessage/postmessage.js
new file mode 100644
index 0000000..d0f4140
--- /dev/null
+++ b/plugin/postmessage/postmessage.js
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+/*
+
+	simple postmessage plugin
+
+	Useful when a reveal slideshow is inside an iframe.
+	It allows to call reveal methods from outside.
+
+	Example:
+		 var reveal =  window.frames[0];
+
+		 // 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]}), '*');
+
+	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( typeof Reveal[method] === 'function' ) {
+			Reveal[method].apply( Reveal, data.args );
+		}
+	}, false);
+
+}());
+
+
+