# Vanilla HTML & JS example Base on the schema on [how-does-it-work](https://posetracker.gitbook.io/posetracker-api/use-posetracker-on-real-time-camera-webcam/how-does-it-work "mention") You need to call our URL through a **iframe.** **Base on this here is a tutorial to use PoseTracker in a web app :** #### Create an HTML file ``` touch test.html ``` #### Integrate PoseTracker Copy/past this in your test.html and **modify your API\_KEY** :

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>PoseTracker Camera Access</title>
    <style>
        #poseTrackerFrame {
            width: 350px;
            height: 350px;
            border: none;
        }
        #infoDisplay {
            margin-top: 20px;
        }
    </style>
</head>
<body>
<iframe 
  id="poseTrackerFrame"
  src="https://app.posetracker.com/pose_tracker/tracking?token=API_KEY&exercise=squat&difficulty=easy&width=350&height=350&progression=true"
  allow="camera *;" 
/>
<div id="infoDisplay">Allow camera and wait few secondes.</div>
<div id="progression">Squat : 0 %</div>
<script>
  window.addEventListener('message', function(event) {
    if (event.origin !== "https://app.posetracker.com") return;

    const data = JSON.parse(event.data);
    updateInfoDisplay(data);
  });

  function updateInfoDisplay(info) {
    const infoDisplay = document.getElementById('infoDisplay');
    const progress = document.getElementById('progression');

    // Sorry for that x)
    if (info.type === 'counter') {
      infoDisplay.textContent = 'Counter: ' + info.current_count;
    } else if (info.type === 'progression') {
      progress.textContent = "Squat : " + info.value + " %"
    } else if (info.type === 'posture') {
      infoDisplay.textContent = info.placementMessage
    } else if (info.type === 'initialization') {
      infoDisplay.textContent = info.message
    } else {
      infoDisplay.textContent = 'Info received: ' + JSON.stringify(info);
    }
  }
</script>
</body>
</html>

#### How does it works ? * First we have the iframe : ```