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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="../dist/cropper.css">
+  <style>
+    .container {
+      max-width: 640px;
+      margin: 20px auto;
+    }
+
+    img {
+      max-width: 100%;
+    }
+  </style>
+</head>
+<body>
+
+  <div class="container">
+    <h1>Cropper with a range of aspect ratio</h1>
+    <div>
+      <img id="image" src="../docs/images/picture.jpg" alt="Picture">
+    </div>
+  </div>
+
+  <script src="../dist/cropper.js"></script>
+  <script>
+    window.addEventListener('DOMContentLoaded', function () {
+      var image = document.querySelector('#image');
+      var minAspectRatio = 0.5;
+      var maxAspectRatio = 1.5;
+      var cropper = new Cropper(image, {
+        ready: function () {
+          var cropper = this.cropper;
+          var containerData = cropper.getContainerData();
+          var cropBoxData = cropper.getCropBoxData();
+          var aspectRatio = cropBoxData.width / cropBoxData.height;
+          var newCropBoxWidth;
+
+          if (aspectRatio < minAspectRatio || aspectRatio > maxAspectRatio) {
+            newCropBoxWidth = cropBoxData.height * ((minAspectRatio + maxAspectRatio) / 2);
+
+            cropper.setCropBoxData({
+              left: (containerData.width - newCropBoxWidth) / 2,
+              width: newCropBoxWidth
+            });
+          }
+        },
+        cropmove: function () {
+          var cropper = this.cropper;
+          var cropBoxData = cropper.getCropBoxData();
+          var aspectRatio = cropBoxData.width / cropBoxData.height;
+
+          if (aspectRatio < minAspectRatio) {
+            cropper.setCropBoxData({
+              width: cropBoxData.height * minAspectRatio
+            });
+          } else if (aspectRatio > maxAspectRatio) {
+            cropper.setCropBoxData({
+              width: cropBoxData.height * maxAspectRatio
+            });
+          }
+        }
+      });
+    });
+  </script>
+</body>
+</html>