<div class="field iti__phone">
  <label for="contact_request_resend_phone" class="field__label">Телефон*:</label>
  <input type="tel" required name="phone" id="contact_request_resend_phone" class="input"
         data-target="contact-request.phoneInput" data-action="change->contact-request#validatePhone">
  <small class="invalid-feedback hidden" data-target="contact-request.invalidPhone">Некорректный телефон!</small>
</div>
<div>
<button type="submit" class="btn btn_try" data-target="contact-request.submitBtn">Отправить</button>
</div>