How do I show success message after submit and route to a url

[kellyshemd]

how can I combine your script

this script

 <script>
    const form = document.querySelector('form');

    form.addEventListener('submit', function(event) {
     event.preventDefault();

     if (form.checkValidity() === false) {
       alert("failed");
       form.classList.add('was-validated');
     } else {
       alert("sucess");
       location.replace("https://www.google.com/");
     }
    }, false);
  </script>

and the scripts that call the user entry

@kellyshemd

<script>
  // Prevent forms from submitting.
  function preventFormSubmit() {
    var forms = document.querySelectorAll('form');
    for (var i = 0; i < forms.length; i++) {
      forms[i].addEventListener('submit', function(event) {
      event.preventDefault();
      });
    }
  }
  window.addEventListener('load', preventFormSubmit);    
      
      
  function handleFormSubmit(formObject) {
    google.script.run.processForm(formObject);
    document.getElementById("myForm").reset();
  }
</script>