Hijack Engagebay form redirection to add external params like UTM

engagebay_utm_hijack.js

  // Hijacking Engagebay HTML form submission redirection
  // By: Luong Ngoc Minh
  // Usage: Replace the original form submit function
  function onSubmit(e, t) {
    e.preventDefault();
    window.EhForm.redirect_to_url = function(a, f, i, b) {
      var g = f;
      try {
        g = JSON.parse(f);
      } catch (h) {
        console.log(h);
      }
      var j = {
        subscriber_data: JSON.stringify(g),
      };
      var c = a;
      c = eh_mustache_fill_Subscriber_Data(g, c);
      if (i) {
        c = EhSync.prepareURL(c, j);
      }
      var d = window.open(c + document.location.search, b ? "_blank" : "_self");
      d.location;
    };
    window.EhForm.submit_form(e, t);
  }