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https://stackoverflow.com/questions/13761968/detect-whether-postmessage-can-send-objects
I found an even easier way to detect if postMessage only supports strings or if it supports other types. Simply add a custom toString-method on the object. When trying to send an object with postMessage in IE8 and IE9 they will be converted to a string with the toString-method on the object.
https://blog.teamtreehouse.com/cross-domain-messaging-with-postmessage
Sep 12, 2013 · Browser Support For postMessage. Support for postMessage() has been around in browsers for some time now. Internet Explorer has included support since version 8 but it’s worth noting that IE8 and IE9 only support postMessage() for communicating between a document and an iframe, support for cross-window/tab messaging arrived in IE10.
https://stackoverflow.com/questions/15061119/detect-browser-support-for-inter-window-communication
This (inter-window communication) works fine in most cases, but doesn't work for some browsers that don't support inter-window communication. Examples include Windows Phone and iPhone's UIWebView. I currently do client-side (javascript based) user-agent sniffing to detect these scenarios - and fallback to a different code path to workaround the ...
https://github.com/jsdom/jsdom/pull/1140
Just to clarify, since I can't find a ton more information on the / option, using a / as targetOrigin means that it only proceeds if sendingWindow.origin === targetWindow.origin?. If the targetOrigin argument is a single literal U+002F SOLIDUS character (/), and the Document of the Window object on which the method was invoked does not have the same origin as the responsible document specified ...
https://stackoverflow.com/questions/16226924/is-cross-origin-postmessage-broken-in-ie10
Internet Explorer 10, however, will support MessageChannel. Firefox currently supports cross-document messaging, but not MessageChannel. So your best bet is probably to have a MessageChannel based codepath, and fallback to postMessage if that doesn't exist. It won't get you IE8/IE9 support, but at least it'll work with IE10.
https://davidwalsh.name/window-postmessage
Nov 03, 2010 · One of the little known HTML5 APIs is the window.postMessage API. window.postMessage allows for sending data messages between two windows/frames across domains. Essentially window.postMessage acts as cross-domain AJAX without the server shims. Let's take a look at how window.postMessage works and how you can use it today in Firefox, IE8+, Opera, Safari, and …
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