karate-demo/src/test/java/mock/web/cats.html

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>Cats</title>
    <script src="https://code.jquery.com/jquery-3.2.1.min.js" integrity="sha256-hwg4gsxgFZhOsEEamdOYGBf13FyQuiTwlAQgxVSNgt4=" crossorigin="anonymous"></script>
  </head>
  <body>
    <div>
      <a href="http://localhost:8080/cats">GET /cats</a> | <a href="http://localhost:8080/hardcoded">GET /hardcoded</a>
    </div>
    <p/>    
    <div>
      <label for="catName">Name: <input id="catName" value="Billie"/></label>
      <button onclick="createCat()">Create Cat</button>
    </div>    
    <p/>
    <div id="response"></div>
    <script>
      var createCat = function() {
        var name = $('#catName').val();
        $.ajax({          
          url: 'http://localhost:8080/cats',
          data: JSON.stringify({ name: name }),
          method: 'POST',
          success: function(result) {
            $('#response').html('created cat: ' + JSON.stringify(result));
          }
        });
      };
    </script>    
  </body>
</html>