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CSS

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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="openVto()">Start the VTO experience (in Faceshape)</button>
    <button onclick="getFaceshape()">Trigger Faceshape analysis</button>
    <button onclick="stopVto()">Stop the VTO experience</button>  
  </div>
  
  <div class="lineContainer">
    <span>Faceshape status: </span><span class="faceshapeModeValue"></span>
  </div>
  
  <div id="fitmix-container"></div>
</div>

<div class="info">
  <div class="errorEntry"><a>10</a> <a>Detection error</a></div>
  <div class="errorEntry"><a>11</a> <a>No face detected</a></div>
  <div class="errorEntry"><a>12</a> <a>Detection server connection error</a></div>
  <div class="errorEntry"><a>20</a> <a>Faceshape server connection error</a></div>
  <div class="errorEntry"><a>21</a> <a>Empty faceshape</a></div>
  <div class="errorEntry"><a>30</a> <a>Not in faceshape mode</a></div>
  <div class="errorEntry"><a>31</a> <a>FBxLive version not compatible</a></div>
  <div class="errorEntry"><a>102</a> <a>Face not aligned to the left / right</a></div>
  <div class="errorEntry"><a>103</a> <a>Face not aligned up / down</a></div>
  <div class="errorEntry"><a>104</a> <a>Face not aligned up / down and left / right</a></div>
  <div class="errorEntry"><a>105</a> <a>Face edge not detected</a></div>
  <div class="errorEntry"><a>106</a> <a>Face shape cannot be classified</a></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;
}

.info {
  position: absolute;
  left: 540px;
  top: 50px;
  border: 1px solid black;
  padding: 14px;
}

.errorEntry > a:first-child {
  display: inline-block;
  width: 40px;
}
!

JS 

              
                var params = { 
  apiKey: 'TBVAcXitApiZPVH791yxdHbAc8AKzBwtCnjtv6Xn',
  frame: '8053672909258',
  onStopVto: hide,
  
  onGetFaceshape: function (data) {
    console.log("onGetFaceshape", data);
    var faceshapeValue = document.querySelector(".faceshapeModeValue");
    if (data.errorCode) {
      faceshapeValue.textContent =
        "Error - Code " +
        data.errorCode +
        " (" +
        data.errorDetail + ")";
    } else {
      faceshapeValue.textContent =
        "Dominant shape = " + data.faceShape + " (full results: " + toPercentage(data.confidence.heart) + ", " + toPercentage(data.confidence.long) + ", " + toPercentage(data.confidence.oval) + ", " + toPercentage(data.confidence.rectangle) + ", " + toPercentage(data.confidence.square) + ", " + toPercentage(data.confidence.triangle) + ")";
    }
  }
};

window.onload = function() {  
  window.fitmixInstance = FitMix.createWidget('fitmix-container', params, function() {
    console.log('FitmixWidget creation complete!');
  });
}

var toPercentage = function (value) {
  return "" + Math.round(value*100) + "%";
}

var getFaceshape = function () {
  fitmixInstance.getFaceshape();
  document.querySelector(".faceshapeModeValue").textContent =
    "getFaceshape in progress...";
};

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

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

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

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

function stopVto(){
  fitmixInstance.stopVto()
}
!
999px

Console