dojo 1.8 integrating html5 postmessage - html

Question

Im trying to get some html5 post messaging going with dojo 1.8, i've created a jsfiddle to try to explain it better. One thing to note is that the button is being loaded within the iframe. So basically if a click happens within the iframe then the parent node should receive and act upon the message. Any pointers would be appreciated.
http://jsfiddle.net/AvPFv/

Answer 1

Basically, you should listen for message on iframe window, i.e. iframe.contentWindow. Also, please note there is no dojo in your iframe.
I created a jsFiddle to show how it works: http://jsfiddle.net/phusick/H7Zh8/ but I'm afraid it is very messy to have everything in a single file, i.e. in the context of the parent window, because it does not explain properly where window reference points to and it does not simulate real world usage. I suggest you try it at localhost having two sets of scripts, one for parent window and one for iframe.
require([
"dojo/dom",
"dojo/on",
"dojo/date/locale",
"dojo/domReady!"
], function(
dom,
on,
locale
) {
var buttonNode = dom.byId("postMessageButton");
var iframeNode = dom.byId("iframe");
var iframe = iframeNode.contentWindow;
var iframeButtonNode = iframe.document.getElementById("postMessageButton");
on(buttonNode, "click", function() {
iframe.postMessage("hello from parent", "*");
});
on(iframe, "message", function(event) {
var msgNode = iframe.document.getElementById("msg");
msgNode.innerHTML += formatMessage(event);
event.source.postMessage("echo from iframe", "*");
});
on(iframeButtonNode, "click", function() {
iframe.parent.postMessage("hello from iframe", "*");
})
on(window, "message", function(event) {
dom.byId("msg").innerHTML += formatMessage(event);
});
function formatMessage(event) {
var time = locale.format(new Date(event.timeStamp),{
selector: "time",
formatLength: "medium"
});
return time + ": " + event.data + "<br>";
}
});