在线运行代码 - 菜鸟教程

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>jQuery UI 缩放（Resizable） - 对齐到网格</title>
  <link rel="stylesheet" href="https://apps.bdimg.com/libs/jqueryui/1.10.4/css/jquery-ui.min.css">
  <script src="https://apps.bdimg.com/libs/jquery/1.10.2/jquery.min.js"></script>
  <script src="https://apps.bdimg.com/libs/jqueryui/1.10.4/jquery-ui.min.js"></script>
  <link rel="stylesheet" href="jqueryui/style.css.html">
  <style>#resizable { width: 150px; height: 150px; padding: 0.5em; }
  #resizable h3 { text-align: center; margin: 0; }
  </style>
  <script>
  $(function() {
    $( "#resizable" ).resizable({
      grid: 50
    });
  });
  </script>
</head>
<body>
 
<div id="resizable" class="ui-widget-content">
  <h3 class="ui-widget-header">网格</h3>
</div>
 
 
</body>
</html>
源代码

动行结果
