Form does not send by IE, nor by firefox

Question

My form is only sending by Chrome, I would like to understand the pq.

It uses the normal post method, only that I have this JS that depending on the value that is there, it sends the user to the page that contains in the select value of a Dropbox.

So that he does not recognize this JS , pq when shooting works, and strange that it only happens in other browsers, in Chrome works (I get the email).

JS

$(function() {
   $('#btnget').click(function(e) {

      let formValido =  document
    .getElementById("formulario")
    .checkValidity();

      if(formValido){
         $("#formulario")
         .attr("action", $('#form').val())
         .submit();
      }
   })
});