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diff --git a/library/cropperjs/docs/examples/customize-preview.html b/library/cropperjs/docs/examples/customize-preview.html
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+++ b/library/cropperjs/docs/examples/customize-preview.html
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+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="utf-8">
+  <meta http-equiv="x-ua-compatible" content="ie=edge">
+  <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
+  <title>Cropper.js</title>
+  <link rel="stylesheet" href="../css/cropper.css">
+  <style>
+    .container {
+      margin: 20px auto;
+      max-width: 960px;
+    }
+
+    img {
+      max-width: 100%;
+    }
+
+    .row,
+    .preview {
+      overflow: hidden;
+    }
+
+    .col {
+      float: left;
+    }
+
+    .col-6 {
+      width: 50%;
+    }
+
+    .col-3 {
+      width: 25%;
+    }
+
+    .col-2 {
+      width: 16.7%;
+    }
+
+    .col-1 {
+      width: 8.3%;
+    }
+  </style>
+</head>
+<body>
+  <div class="container">
+    <h1>Customize preview for Cropper</h1>
+    <div class="row">
+      <div class="col col-6">
+        <img id="image" src="../images/picture.jpg" alt="Picture">
+      </div>
+      <div class="col col-3">
+        <div class="preview"></div>
+      </div>
+      <div class="col col-2">
+        <div class="preview"></div>
+      </div>
+      <div class="col col-1">
+        <div class="preview"></div>
+      </div>
+    </div>
+  </div>
+
+  <script src="../js/cropper.js"></script>
+  <script>
+    function each(arr, callback) {
+      var length = arr.length;
+      var i;
+
+      for (i = 0; i < length; i++) {
+        callback.call(arr, arr[i], i, arr);
+      }
+
+      return arr;
+    }
+
+    window.addEventListener('DOMContentLoaded', function () {
+      var image = document.querySelector('#image');
+      var previews = document.querySelectorAll('.preview');
+      var cropper = new Cropper(image, {
+          ready: function () {
+            var clone = this.cloneNode();
+
+            clone.className = '';
+            clone.style.cssText = (
+              'display: block;' +
+              'width: 100%;' +
+              'min-width: 0;' +
+              'min-height: 0;' +
+              'max-width: none;' +
+              'max-height: none;'
+            );
+
+            each(previews, function (elem) {
+              elem.appendChild(clone.cloneNode());
+            });
+          },
+
+          crop: function (event) {
+            var data = event.detail;
+            var cropper = this.cropper;
+            var imageData = cropper.getImageData();
+            var previewAspectRatio = data.width / data.height;
+
+            each(previews, function (elem) {
+              var previewImage = elem.getElementsByTagName('img').item(0);
+              var previewWidth = elem.offsetWidth;
+              var previewHeight = previewWidth / previewAspectRatio;
+              var imageScaledRatio = data.width / previewWidth;
+
+              elem.style.height = previewHeight + 'px';
+              previewImage.style.width = imageData.naturalWidth / imageScaledRatio + 'px';
+              previewImage.style.height = imageData.naturalHeight / imageScaledRatio + 'px';
+              previewImage.style.marginLeft = -data.x / imageScaledRatio + 'px';
+              previewImage.style.marginTop = -data.y / imageScaledRatio + 'px';
+            });
+          },
+        });
+    });
+  </script>
+</body>
+</html>