Hey all!,

I'm running a study online and would like to know when participants in the study switch tabs (e.g., as a rough, indirect proxy of attention). I've done this before on Qualtrics and was trying to adapt the logic, but I haven't succeeded thus far. I have:

• Disabled the XSS filter.
• Added the following code to custom.js (thinking this will be ran in every page so it will create a string with the question IDs where the tabswitching took place):
  Code:

  $(document).on('ready pjax:scriptcomplete',function(){
   
    // When the window is blurred (i.e., loses focus)
    $(window).blur(function(){
      if (tabSwitches !== undefined) { // We check if we have defined TB before
        var tabSwitches = ""; // If not, we define it
      }
      tabSwitches += ("{SGQ}"); // Then we add the question ID to the string
      tabSwitches += "&"; // And add & as a separator
    });
  });

• Created a short free text question after all the questions in which I want tab switching to be registered. It then has the following code within the question field:
  Code:

  <script type="text/javascript" charset="utf-8">
  $(document).on('ready pjax:complete',function() {
  // Hide this answer field
  document.getElementById("answer{SGQ}").style.display='none';
  // Save tabSwitches
  $('input#answer{SGQ}').text(tabSwitches);
  // Troubleshoot
  alert("SGQ is: {SGQ} and tabSwitches is: " + tabSwitches);
  });
  </script>

As is, the alert isn't running at all (haven't checked the database, but I bet it's empty as well). I think it's because tabSwitches is undefined and spoils the rest (if I remove the tabSwitches variable, the alert runs correctly and replaces {SGQ} with the correct number), so I would love if anyone could help me out, particularly in understanding if it is possible to get custom.js to run in every page or whether I have to turn what I have there into a function that I call in every single question. Thanks!

I think it's because you only define tabSwitches in a blur event which won't have happened as the page loads.