Is cross-origin postMessage broken in IE10?

Question

I\'m trying to make a trivial postMessage example work...

• in IE10
• between windows/tabs (vs. iframes)
• across origins

Answer 1

== WORKING SOLUTION IN 2020 without iframe ==

Building on answer by tangle, I had success in IE11 [and emulated IE10 mode] using following snippet:

var submitWindow = window.open("/", "processingWindow");
submitWindow.location.href = 'about:blank';
submitWindow.location.href = 'remotePage to comunicate with';

Then I was able to communicate using typical postMessage stack, I'm using one global static messenger in my scenario (alotough I don't suppose it's of any signifficance, I'm also attaching my messenger class)

var messagingProvider = {
    _initialized: false,
    _currentHandler: null,

    _init: function () {
        var self = this;
        this._initialized = true;
        var eventMethod = window.addEventListener ? "addEventListener" : "attachEvent";
        var eventer = window[eventMethod];
        var messageEvent = eventMethod == "attachEvent" ? "onmessage" : "message";

        eventer(messageEvent, function (e) {
            var callback = self._currentHandler;
            if (callback != null) {
                var key = e.message ? "message" : "data";
                var data = e[key];
                callback(data);
            }
        }, false);
    },

    post: function (target, message) {
        target.postMessage(message, '*');
    },

    setListener: function (callback) {
        if (!this._initialized) {
            this._init();
        }

        this._currentHandler = callback;
    }
}

No matter how hard I tried, I wasn't able to make things work on IE9 and IE8

My config where it's working:
IE version: 11.0.10240.16590, Update versions: 11.0.25 (KB3100773)