MessageManager messages in HTML panel

[cadorn]

I am using https://github.com/firebug/devtools-extension-examples/tree/master/MessageManager

I am trying to get messages from chrome scope in scripts loaded into the myPanel.html page.

So I am receiving messages in the frame-script.js but how do I now pass these onto the HTML page?

Using following in frame-script.js and myPanel.html respectively does not work:

content.postMessage(data, "*");

window.addEventListener("message", messageListener, false);

Do I need to send messages by using a DOM element as a proxy?

[janodvarko]

I don't see any reason why postMessage/addEventListener combo should not work and the example should definitely be fixed.

Also, I have been using DOM events for communication between the frame script and the window scope in some of the DevTools extensions.

See e.g. here:
https://github.com/firebug/pixel-perfect/blob/8106cbfecb9a9a59544fa172f6d12cb9c924109c/data/popup-frame-script.js#L36

So, you might use it as a workaround till it's clear why the Message manager doesn't work (I recall I had some issues and it might be that the event listener is appended too late/soon or something like that).

Honza