Mailchimp Ajax subscribe

mc-sub.js

  $('#mc-embedded-subscribe-form').submit(function(e) {
    e.preventDefault();
    $('#loading_gif_mc').show();
    $('#mc_embed_signup').hide();
    $.ajax({
      type: $('#mc-embedded-subscribe-form').attr('method'),
      url: $('#mc-embedded-subscribe-form').attr('action'),
      data: $('#mc-embedded-subscribe-form').serialize(),
      cache: false,
      dataType: 'json',
      contentType: 'application/json; charset=utf-8',
      error: function(err) {
        $('#mc-embedded-subscribe-form').html("<h3>We're sorry, something went wrong</h3>");
        $('#loading_gif_mc').hide();
        $('#mc_embed_signup').show();
      },
      success: function (data) {
        $('#loading_gif_mc').hide();
        $('#mc_embed_signup').show();
        if (data.result == "success") {
          $('#mc-embedded-subscribe-form').html("<p>Thank you!</p>");
        } else {
          $('#mc-embedded-subscribe-form').html('<div class="text-danger">' + data.msg + '</div>');
        }
      }
    });
  });