jQuery(document).ready(function( $ ){
  alert("I am ready");
  document.addEventListener( 'wpcf7mailsent', function( event ) {
    gtag('event', 'Contact Form Submitted', {
      'event_category': 'Contact_Form',
      'event_action': 'Contact_Form_Submit'
    });
    alert("Event submitted");
  }, false );
});