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CSS

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JavaScript

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Babel includes JSX processing.

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HTML 

              
                <script src="//vto-advanced-integration-api.fittingbox.com/index.js" type="text/javascript"></script>

<div class="wrapper">
  <div>
    <button onclick="fitmixInstance.setFrame('8053672909258')">Sample frame 1</button>
    <button onclick="fitmixInstance.setFrame('8056597233958')">Sample frame 2</button>
  </div>
  <div>
    <button onclick="fitmixInstance.setLensMaterial('Sample_Brown')">Sample Brown Material</button>
    <button onclick="fitmixInstance.setLensMaterial('Sample_Black')">Sample Black Material</button>
    <button onclick="fitmixInstance.setLensMaterial('Sample_Purple')">Sample Purple Material</button>
    <button onclick="fitmixInstance.setLensMaterial('Sample_Grey')">Sample Grey Material</button>
    <button onclick="fitmixInstance.setLensMaterial('Sample_Blue')">Sample Blue Material</button>
  </div>
  <div>
    <button onclick="fitmixInstance.setLensMaterial('Sample_Photochromic')">Sample Photochromic Material</button>
  <label for="exposure">Photochromic - Exposure</label>
  <input type="range" id="exposure" name="exposure" min="0" max="100" />
  </div>
  
  <button onclick="openVto()">User action to start the VTO experience</button>
  <button onclick="stopVto()">User action to stop the VTO experience</button>  

  <div id="fitmix-container"></div>
</div>
!

CSS 

              
                html, body {
  margin: 0;
}

.wrapper {
  --padding: 0.5rem;
  height: calc(100vh - var(--padding) * 2);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: var(--padding);
}

#fitmix-container {
  width: min(500px, 90vw);
  flex: 1;
  display:none;
}
!

JS 

              
                var params = { 
  apiKey: 'TBVAcXitApiZPVH791yxdHbAc8AKzBwtCnjtv6Xn',
  frame: '8053672909258',
  onStopVto: hide,
  
  // Used to display the embedded native "toolbar"
  /*  materials: {
    materials: [
      {
        name: 'Sample_Brown',
        image: 'https://picsum.photos/32?random=1'
      },
      {
        name: 'Sample_Green',
        image: 'https://picsum.photos/32?random=2'
      },
      {
        name: 'Sample_Black',
        image: 'https://picsum.photos/32?random=3'
      },
      {
        name: 'Sample_Purple',
        image: 'https://picsum.photos/32?random=4'
      },
      {
        name: 'Sample_Grey',
        image: 'https://picsum.photos/32?random=5'
      },
      {
        name: 'Sample_Blue',
        image: 'https://picsum.photos/32?random=6'
      }
    ]
  }*/
};

window.onload = function() {  
  window.fitmixInstance = FitMix.createWidget('fitmix-container', params, function() {});
}

const fitmix = document.getElementById("fitmix-container")

function hide(){
  fitmix.style.display= 'none';
}

function show(){
  fitmix.style.display= 'block';
}

function openVto(){
  fitmixInstance.startVto('live')
  show()
}

function stopVto(){
  fitmixInstance.stopVto()
}

var exposureInput = document.getElementById("exposure");
exposureInput.addEventListener("change", function() {
  fitmixInstance.setExposureLevel(Number(exposureInput.value));
}, false);
!
999px

Console