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Is it possible to find foreign instances of certain website? Ofc theese are independently opened tabs (not by window.open). I need to prevent user from opening 2 tabs, and send message to previously opened tab to inform that it's impossible to op...

I'm currently having an issue with getting javascript and python to communicate in web2py.  controller:  def testDB():         a=[]         a.append('a')         a.append('b')         a.append('c')         return dict(m=a)...

Good day to all.  I need to do this:  When user X press a button user Y sees a photo. Before that user Y sees nothing.   I did this like this: I created a database on a mysql server and created a table with photos and flags. When user X presses the b...

I'm trying to build an Extension which sends data from the popup.html to the tab dome, but I can't get the sendMessage to work and I don't understand why. I'm following this guidline: https://developer.chrome.com/extensions/messaging....

I'm using Angular 1.5.9.   Right now I have two components which need to communicate. If I change something in the first one (for example choose item in the list) => second one needs to be changed (item that was chosen needs to be displayed) a...

Is there a way for the parent to pass-in a reference of an object declared in a function in the parent window to be accessible to a child iFrame?  Using postMessage doesn't do the trick, especially as IE9 doesn't support objects and data need...

I'm trying to implement a mechanism to send textual data (JSON for instance) in from page to page, using javascript at the same machine.  I found some code and wrapped it but it only works at the same page.  At the moment I don't want to use...

I'm developing a WPF application with only a WebBrowser that launch a HTML page with JavasCript. I also have some C# methods.  I'm looking for a good way to launch my C# methods in JavaScript, with parameters and if possible callbacks.  For n...

So, how does it work?  How come having a receiver.html can allow cross domain communication?  I... just... don't understand.  For example, (using Heyzap as example)  <script type="text/javascript" src="http://tools.heyzap.com/exter...