diff --git a/docs/examples/drag.html b/docs/examples/drag.html
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+<!DOCTYPE html>
+<meta charset="utf-8">
+<meta property="og:image" itemprop="image primaryImageOfPage" content="https://hajimehoshi.github.io/ebiten/images/examples/drag.png">
+<meta name="description" content="Ebiten example - drag">
+<link rel="shortcut icon" href="../favicon.png" type="image/png" >
+<link rel="icon" href="../favicon.png" type="image/png" >
+<title>Ebiten example - drag</title>
+
+<link rel="stylesheet" href="../stylesheets/bootstrap.min.css">
+<link rel="stylesheet" href="../stylesheets/highlight-github.css">
+<link rel="stylesheet" href="../stylesheets/ebiten.css">
+<script src="../scripts/googleanalytics.js"></script>
+
+<nav class="navbar"><div class="container">
+  <nav class="d-flex flex-row" style="width: 100%;">
+    <div class="nav mr-auto"><a class="navbar-brand" href="../"><img src="../images/logo_white.svg" alt="EBITEN"></a></div>
+    <ul class="nav">
+      <li class="nav-item"><a class="nav-link" href="https://github.com/hajimehoshi/ebiten">GitHub</a></li>
+      <li class="nav-item"><a class="nav-link" href="https://godoc.org/github.com/hajimehoshi/ebiten">GoDoc</a></li>
+      <li class="nav-item"><a class="nav-link" href="https://github.com/hajimehoshi/ebiten/wiki">Wiki</a>
+    </ul>
+  </nav>
+</div></nav>
+
+<main><div class="container">
+
+  <h2>Ebiten example - drag</h2>
+  <iframe src="https://jsgo.io/github.com/hajimehoshi/ebiten/examples/drag" width="640" height="480" allow="autoplay"></iframe>
+  <p><a href="https://play.jsgo.io/github.com/hajimehoshi/ebiten/examples/drag">Go Playground page</a></p>
+
+</div></main>
+
+<footer><div class="container">
+  <p>© 2013 Hajime Hoshi</p>
+  <p>Code is licensed under <a href="https://github.com/hajimehoshi/ebiten/blob/master/LICENSE">the Apache License 2.0</a>.</p>
+  <p>The content of this page is licensed under <a href="https://creativecommons.org/licenses/by/4.0/">the Creative Commons Attribution 4.0 License</a>.</p>
+</div></footer>
+
+<script src="../scripts/highlight.pack.js"></script>
+<script>hljs.initHighlightingOnLoad();</script>
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