Fax Box Callbacks

Question

Fax Box Callbacks

I work with fancybox2, and I need to add some custom features before the PDF goes into the print queue. I need fancybox print callbacks (e.g. before printing, after printing). Can anyone help me? I tried window.print () callbacks, but they do not work in case of fancybox printing, following the pattern I used

$(function(){
  var beforePrint = function() {
    alert("BEfore print")
    console.log('Functionality to run before printing.');
  };
  var afterPrint = function() {
    console.log('Functionality to run after printing');
    alert("After print")
  };

  if (window.matchMedia) {
    var mediaQueryList = window.matchMedia('print');
    console.log("Match media ..." + mediaQueryList)
    mediaQueryList.addListener(function(mql) {
      console.log("Mql matches ...."+ mql.matches)
      if (mql.matches) {
        beforePrint();
      } else {
        afterPrint();
      }
    });
  }

  window.onbeforeprint = beforePrint;
  window.onafterprint = afterPrint;
}());

This does not work for fancybox printing, but it works when we try to print windows (for example, when we use ctrl + p). I need to handle callbacks when I click on the fancybox pdf print icon, look at the attached image