jquery 之prop与attr

attr：属性值，代表着初始化的值

prop：可获得变动的值

select,check

eg:

<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title></title>
    <script src="jquery.min.js"></script>
    <script type="text/javascript">
        function checkclick() { 
            console.log($(":checkbox").prop("checked"));//为ture与false交替
            console.log($(":checkbox").attr("checked"));//一直为checked
        }
        
         
    </script>
</head>

<body>
    <input type="checkbox"  checked="checked" onclick="checkclick();"/>
</body>
</html>