<!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>