Detect whether postMessage can send objects?

Question

I\'m looking for a neat way to detect whether postMessage in the browser supports the sending and receiving of objects or just strings. I figure that someone out there must

Answer 1

I wanted to know the same thing. I created this script to detect if an object could be passed in postMessage by a simple callback to the current window. You will see IE 9 return false, IE 10 returns true.

http://jsfiddle.net/milesplit/DvqqH/

var supportsPostObject = false;

(function(){
    var callback = function(e) {
        supportsPostObject = (typeof(e.data)!='string');
    };
    (window.addEventListener) ?
        window.addEventListener('message', callback) :
        window.attachEvent('onmessage', callback);
    ('postMessage' in window) && window.postMessage({}, '*');
})();

setTimeout(function(){
   alert(supportsPostObject);
}, 0);