Sample Windows 8 JS app

// For an introduction to the Blank template, see the following documentation:
// http://go.microsoft.com/fwlink/?LinkId=232509
(function () {
    "use strict";
 
    var app = WinJS.Application;
    var activation = Windows.ApplicationModel.Activation;
    WinJS.strictProcessing();
 
    // open and close the session on visibility change events. This causes the session to be resumed if the
    // user is gone for less than 15 seconds, otherwise a new session is created.
    var onVisibilityChange = function (args) {
      var state = document["visibilityState"];
      if (state == "visible")
      {
        localyticsSession.open();
        localyticsSession.upload();
      }
      else if (state == "hidden") {
        localyticsSession.close();
        localyticsSession.upload();
      }
    };
    document.addEventListener("visibilitychange", onVisibilityChange, false);
 
    app.onactivated = function (args) {
        if (args.detail.kind === activation.ActivationKind.launch) {
            if (args.detail.previousExecutionState !== activation.ApplicationExecutionState.terminated) {
                // TODO: This application has been newly launched. Initialize
                // your application here.
            } else {
                // TODO: This application has been reactivated from suspension.
                // Restore application state here.
            }
            args.setPromise(WinJS.UI.processAll());
 
            var sampleButton = document.getElementById("sampleButton");
            sampleButton.addEventListener("click", eventButtonHandler, false);
 
            // whenever the app is activated, initialize a localytics object.
            var options = { logger: true, polling: false };
            var localyticsSession = LocalyticsSession("871b4e162f27f37fb8db3b0-0dcd0bf8-d040-11e1-4668-00ef75f32667", options);
            localyticsSession.open();
            localyticsSession.upload();
        }
    };
 
    app.oncheckpoint = function (args) {
        // TODO: This application is about to be suspended. Save any state
        // that needs to persist across suspensions here. You might use the
        // WinJS.Application.sessionState object, which is automatically
        // saved and restored across suspension. If you need to complete an
        // asynchronous operation before your application is suspended, call
        // args.setPromise().      
    };
 
 
    function eventButtonHandler(eventId) {
        var sampleInput = document.getElementById("sampleInput").value;
        localyticsSession.tagEvent("Button pressed", { "User input": sampleInput });
    }
 
    app.start();
})();

<title>SampleLocalyticsApp</title>
 
<!-- WinJS references -->

 
 
<!-- SampleLocalyticsApp references -->
 
 
 
<h1>This is a sample Localytics application</h1>
<p>Sample input field:</p>
 
<button id="sampleButton">Test Event</button>