Very simple js test that doesn't work with Minko

I've some problem in sending a simple message in overlay-example of Minko library.
I tried use the c++ code of this example without modifying it, while I add a Minko.addListener in my javascript. The code of the js is here:

<html>
   <head>
   </head>
  <body>
  <script>
      Minko.addEventListener("hello", function() {
          /* simply replace ":" with <-----> */
      document.getElementById("gameTimeLeftSeparator").textContent = "<------>"
    });
  </script>
  <body>
                <div id="content">
                        <div id="scoreBanner">
                                <div id="scoreBannerBackground"></div>
                                <div class="teamScore" id="teamScoreRed">0</div>
                                <div class="teamScore" id="teamScoreBlue">0</div>
                                <div class="gameTimeLeft" id="gameTimeLeftMn">0</div>
                                <div class="gameTimeLeft" id="gameTimeLeftSeparator">:</div>
                                <div class="gameTimeLeft" id="gameTimeLeftSec">0</div>
                        </div>
                </div>
                <body >
  </body>
</html>

I really don't understand where is the problem. I add the listener, and my very simple function (tested with a classical addListener("click", ... ) is working. Here I use Minko.addListener("hello", ... ) that is sent by c++ (line 113 of the main.cpp of that example).

Solution

What you're doing in your app is a very bad example of C++/JS messaging since you can implement the exact same behavior simply using the C++ DOM API like this:

overlay->mainDOM()->getElementById("gameTimeLeftSeparator")->textContent("<----->");

If what you're trying to do is simply to update a DOM element (content), then the code above (or similar C++ DOM API methods) is the way to go.

If your actual use case cannot be implemented using the C++ DOM API, please update your original question/example accordingly.

Anyway, this:

Minko.addEventListener("hello", ...

should be this of course:

Minko.addEventListener("message", ...

cf this answer