Detect Print Popup Opening or a Dowload

Question

i was wondering if anyone knows any way to detect the opening of that standard print popup for the execution of a javascript.

My problem: I needed to run a script when the user downloaded or printed a PDF that is being displayed to him as follows within my page:

He would have to use these two default viewer embebbed options. Does anyone know how I would capture these events with javascript? (Remembering that the viewer code is external, I could not capture the button ids).

Answer 1

Christian I confess that I don’t quite understand what you want to do, but I left an example for you to see how you can perform an action before printing using the native javascript method onbeforeprint:

function Antes() {
  window.onbeforeprint = function() {
     alert('Antes de imprimir!')
  }
}

function Imprimir() { 
  window.print()
}

<button onclick="Antes();Imprimir()">Imprimir</button>