<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>ConfigCat Demo</title>
  <script type="text/javascript" src="https://cdn.jsdelivr.net/npm/configcat-js@latest/dist/configcat.min.js">
  </script>
  <script src="https://code.jquery.com/jquery-3.4.1.slim.min.js" integrity="sha256-pasqAKBDmFT4eHoN2ndd6lN370kFiGUFyTiUHWhU7k8=" crossorigin="anonymous"></script>
  <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
  <style type="text/css">
  </style>
</head>

<body>
  <h2 class="mb-5">ConfigCat Demo</h2>
  <div>
    <p><a href="https://app.configcat.com/apikey" target="_blank">Login</a> and copy your SDK Key and Feature Flag Key from ConfigCat. Or <a href="https://app.configcat.com/startnow" target="_blank">Get an API Key and Feature Flag Key without
                    registering.</a></p>
    <label for="apikey">SDK Key:</label>
    <input type="text" class="form-control mb-3" name="apikey" id="apikey" size="47">
    <label for="flagkey">Feature Flag Key:</label>
    <input type="text" class="form-control" name="flagkey" id="flagkey" value="isAwesomeFeatureEnabled">
    <button id="start" class="btn btn-primary mt-3">Start</button>
  </div>
  <p id="flip" hidden>Flip the switch <img src="switch.png" alt="switch"> under <a href="https://app.configcat.com" target="_blank">Feature Flags & Settings</a> to see the page update dynamically.</p>
  <h5>The current state of your Feature Flag is:</h5>
  <h1 id="unknown"><span class="badge badge-secondary">Unknown</span></h1>
  <h1 id="on" hidden><span class="badge badge-success">ON</span></h1>
  <h1 id="off" hidden><span class="badge badge-danger">OFF</span></h1>
</body>

</html>
html,
body {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 2em;
  height: 100%;
  width: 100%;
}

$(document).ready(function() {
  $("#start").click(function() {
    var configCatClient = configcat.createClientWithAutoPoll(
      $("#apikey").val(),
      {
        pollIntervalSeconds: 4,
        configChanged: function() {
          updateFeatureFlagValue();
        }
      }
    );
    $("#apikey").prop("disabled", true);
    $("#flagkey").prop("disabled", true);
    $("#start").prop("disabled", true);

    function updateFeatureFlagValue() {
      configCatClient.getValue($("#flagkey").val(), false, function(value) {
        $("#unknown").prop("hidden", true);
        $("#flip").prop("hidden", false);
        if (value) {
          $("#on").prop("hidden", false);
          $("#off").prop("hidden", true);
        } else {
          $("#on").prop("hidden", true);
          $("#off").prop("hidden", false);
        }
      });
    }
    updateFeatureFlagValue();
  });
});

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External JavaScript

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