Materialize Contact Request Ajax Form

<div class="container">
  <div class="row">
    <div class="col s12 m8 offset-m2 offset-l3 l7 offset-xl4 xl6">
      <form id="contact-form" method="POST" action="https://herotofu.com/start">
        <div class="row">
          <div class="input-field col s12">
            <input
              name="name"
              placeholder="Joe Bloggs"
              id="full_name"
              type="text"
              class="validate"
            />
            <label for="full_name">Your name</label>
          </div>
        </div>
        <div class="row">
          <div class="input-field col s12">
            <input
              name="email"
              placeholder="joe.bloggs@example.com"
              id="email_address"
              type="email"
              class="validate"
              required
            />
            <label for="email_address">Email address</label>
          </div>
        </div>

        <div class="row">
          <div class="input-field col s12">
            <textarea
              name="message"
              id="message"
              class="materialize-textarea validate"
              placeholder="Tell us what you're thinking about..."
            ></textarea>
            <label for="message">Message</label>
          </div>
        </div>

        <div class="row">
          <div class="col s12">
            <button
              id="form-submit"
              type="submit"
              class="btn waves-effect waves-light"
            >
              Contact Us
            </button>
          </div>
        </div>

        <div class="right-align">
          <small
            >by
            <a
              href="https://herotofu.com"
              class="grey-text text-darken-3"
              target="_blank"
              >HeroTofu</a
            ></small
          >
        </div>
      </form>
    </div>
  </div>
</div>
<script>
  $('#contact-form').submit(function (e) {
    e.preventDefault();

    var $form = $(this),
      $formSubmit = $('#form-submit'),
      formArray = $form.serializeArray(),
      data = {};

    $formSubmit.attr('disabled', 'disabled').text('Loading...');

    for (var i = 0; i < formArray.length; i++) {
      data[formArray[i].name] = formArray[i].value;
    }

    $.ajax({
      type: 'POST',
      contentType: 'application/json; charset=utf-8',
      dataType: 'json',
      url: $form.attr('action'),
      data: JSON.stringify(data),
    }).always(function (data) {
      if (data.status === 422) {
        alert('Ajax requests do not support captcha. Please turn it off.');
        $formSubmit
          .parent()
          .html('<strong>Error, failed to send the message!</strong>');
      }

      if (data.status !== 200) {
        alert('Error: ' + data.statusText + ' (' + data.status + ')');
        $formSubmit
          .parent()
          .html('<strong>Error, failed to send the message!</strong>');
      }

      $formSubmit.parent().html('Thank you for contacting us!');
    });
  });
</script>

/* The following CSS is used only for the preview,
   please don't copy it to your production code */
body { padding: 2rem 0; }