demo2.html

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>
    <link href="app.css" rel="stylesheet" type="text/css"/>
    <script src="./Sortable.js"></script>
 <body>
             <ul id="foo" class="block__list block__list_words">
                <li>1</li>
                <li>2</li>
                <li>3</li>
                <li>4</li>
                <li>5</li>
                <li>6</li>
                <li>7</li>
                <li>8</li>
            </ul>
     
      <script>
                 Sortable.create(document.getElementById('foo'), 
                    {
                      animation: 150, //动画参数
                     });
      </script>  
</body>
</html>