Run Script onload in a Dashboard Template Node?

[haema...@gmail.com]

In the Dashboard Template node I want to have it send an output message when someone loads a specific Tab.  The UI Control Node won't work because it doesn't tell you which Tab is activated.

This output message contains information specific to the loaded page that I want downstream nodes to use to do some work.

After searching and trying several things I came up with this code as the HTML part of the template.  It seems reasonable to me but doesn't work.  I'm obviously not understanding something.

       

<img src onerror="myFunction()"> 
<script>

    function myFunction() {

        this.scope.action = function() { return "Im here"; };

    }
</script>

I chained this to a Debug Node.  

I just wanted to see "Im here" show up in the debug window when the page is viewed --> http://<myip>:1880/ui/#/0

I'm not very experienced with this and am hoping there's an easy solution someone can share.

[Colin Law]

This shows you how to send a message to the flow when a browser
view is opened on a template

http://flows.nodered.org/flow/a3485bb4b8065c782e210cced7f21f45

Colin

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[haema...@gmail.com]

Perfect.  Thank you.  

Guess I didn't search hard enough.

[haema...@gmail.com]

That can be distilled down to:

 

<script>

(function() {

    (function(scope) {

        scope.send({payload: "preload"}); // this gets sent when the view is opened in the browser

    })(scope);

})();

</script>

Seems to work fine.