Hi,

What you can do is the following:

1. Create a new folder in App_Plugins called 'CustomTimeoutMessage'

2. Create a js file (for example custom.timeout.service.js)

       angular.module("umbraco").run(function(eventsService){    
        //Add the eventlistener here )};
   

3. Then to make sure this runs when umbraco loads, create a package.manifest

{ "javascript": [ "~/App_Plugins/CustomTimeoutMessage/custom.timeout.service.js" ] }

Let me know how it goes!

(sorry for the code snippets, I never get this to show right ;) )

-Joep