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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%;
+    }
+
+    .cropper-view-box,
+    .cropper-face {
+      border-radius: 50%;
+    }
+  </style>
+</head>
+<body>
+
+  <div class="container">
+    <h1>Crop a round image</h1>
+    <h3>Image</h3>
+    <div>
+      <img id="image" src="../docs/images/picture.jpg" alt="Picture">
+    </div>
+    <h3>Result</h3>
+    <p>
+      <button type="button" id="button">Crop</button>
+    </p>
+    <div id="result"></div>
+  </div>
+
+  <script src="../dist/cropper.js"></script>
+  <script>
+    (function () {
+
+      function getRoundedCanvas(sourceCanvas) {
+        var canvas = document.createElement('canvas');
+        var context = canvas.getContext('2d');
+        var width = sourceCanvas.width;
+        var height = sourceCanvas.height;
+
+        canvas.width = width;
+        canvas.height = height;
+
+        context.imageSmoothingEnabled = true;
+        context.drawImage(sourceCanvas, 0, 0, width, height);
+        context.globalCompositeOperation = 'destination-in';
+        context.beginPath();
+        context.arc(width / 2, height / 2, Math.min(width, height) / 2, 0, 2 * Math.PI, true);
+        context.fill();
+
+        return canvas;
+      }
+
+      window.addEventListener('DOMContentLoaded', function () {
+        var image = document.getElementById('image');
+        var button = document.getElementById('button');
+        var result = document.getElementById('result');
+        var croppable = false;
+        var cropper = new Cropper(image, {
+          aspectRatio: 1,
+          viewMode: 1,
+          ready: function () {
+            croppable = true;
+          }
+        });
+
+        button.onclick = function () {
+          var croppedCanvas;
+          var roundedCanvas;
+          var roundedImage;
+
+          if (!croppable) {
+            return;
+          }
+
+          // Crop
+          croppedCanvas = cropper.getCroppedCanvas();
+
+          // Round
+          roundedCanvas = getRoundedCanvas(croppedCanvas);
+
+          // Show
+          roundedImage = document.createElement('img');
+          roundedImage.src = roundedCanvas.toDataURL()
+          result.innerHTML = '';
+          result.appendChild(roundedImage);
+        };
+
+      });
+
+    })();
+  </script>
+</body>
+</html>