TRACK AJAX REQUESTS Success callback across multiple js files

global-callback-listener.js

//Within jquery you can listen to global ajax event handlers for the outcome of any ajax requests for when you want to write
// your own callback from predefined ajax calls

// e.g.
// the below js call is in a separate js file say 'main.js'
function makeAjaxCall(){
  //...
  $.ajax({
    url: 'http://something.com'
  });
}

// below is your own code in a separate file you want to define a callback for ..
// say 'myfile.js'

function mycustomcallback(){
  $( document ).ajaxSuccess(function( event, request, settings ) {
    if(settings.url.match('http://something.com')){
      // activate your callback here
    }
  })
});
}