anchor.diff:          onSuccess: function(response){
               // success to get card token
               // [2] Send AJAX to let backend charge the card using the card token_id
  -            fetch("/coreapi-card-charge-ajax-handler", {
  +            fetch("/coreapi_card_charge_ajax_handler", {
                   method : "POST",
                   body: JSON.stringify({
                       "token_id" : response.token_id,
  
positive.code: <!-- Import MidtransNew3ds library -->
  <!-- TODO change data-environment to `production` for Production mode -->
  <!-- TODO change data-client-key to your production client key for Production mode -->
  <script id= "midtrans-script" src="https://api.midtrans.com/v2/assets/js/midtrans-new-3ds.min.js" data-environment="sandbox" data-client-key="SB-Mid-client-ArNfhrh7st9bQKmz" type="text/javascript"></script>
  
  <!-- Javascript for token generation -->
  <script type="text/javascript">
  
negative.code: 
  <section>
    <h4>Snap Redirect</h4>
    <a href="/snap_redirect">Click here</a>
  </section>
  <br>
  <h3>Core API Credit Card</h3>
  <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/picomodal/3.0.0/picoModal.js"></script>
  
  <h1>Checkout</h1>
  <form action="/coreapi_card_charge_ajax_handler" method="POST" id="payment-form">
    <fieldset>
      <legend>Checkout</legend>
      <small><strong>Field that may be presented to customer:</strong></small>
  