I wrote a form validation using JavaScript, but I don't know how to link this validation with sweetalert2, so it only submits when the validation is true.

//Event listener for the form

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

  checkInputs();
  checkLength(password, 3, 15);
  checkLength(username, 3, 15);
  Swal.fire('Form Submission Successful', 'Thank you', 'success');
});

I only want it to submit when the form passes the validation.