<script type='text/javascript' data-main="js/config" src='node_modules/requirejs/require.js'></script>
<script type='text/javascript' src='js/app.js'></script>

requirejs.config({
    baseUrl: "node_modules",
    paths: {
        jquery: "/jquery/dist/jquery.min"
    }
});

require(['jquery'], function($){

  $('.event-form').on('submit', function(e){
    e.preventDefault();

    $.ajax({
      type: "POST",
      url: "/createevent.php",
      dataType: "json",
      data: {serviceKey: "some_service_key"},
      success: function (data) {
        console.log(data)
      }
    });

  })
});