jQuery prop

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title></title>
    </head>
    <body>
        <input type="checkbox" class="hobby" name="hobby" value="swim" />游泳
        <input type="checkbox" class="hobby" name="hobby" value="tv" checked="checked" />看电视
        <input type="checkbox" class="hobby" name="hobby" value="run" />跑步
        <input type="checkbox" class="hobby" name="hobby" value="sport" />运动
        <input type="button" id="b" value="取值" />
        <script type="text/javascript" src="../images/jquery-3.4.1.min.js"></script>
        <script type="text/javascript">
            $("#b").click(function(){
                $(".hobby").each(function(index,item){
                    /* item为DOM对象 */
                    /* var val = $(item).attr("value"); */
                    /* attr能取到就是checked的值,不能取到就是undefined */
                    /* var val = $(item).attr("checked"); */
                    /* prop函数能取到checke的值就是true,不能取到就是false
                    只针对checked,visibled,selected,disabled*/
                    /* var val = $(item).prop("checked");
                    alert("值为:"+ val); */
                    /* 为所有匹配元素设置一个属性值  */
                    $("input").prop("class","hobb");
                })
            });
            
        </script>
    </body>
</html>

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转载自www.cnblogs.com/qilin20/p/12669687.html