如何获取radio单选是选中哪一个？

Question

<input name="dt" type="radio" id="first"/>
<input name="dt" type="radio" id="second"/>

勾选了first，jq获取两个input返回都是on，要怎么知道假如我勾选了first，就获取first

Answer 1

<script&nbsp;src="jquery-1.12.4.js"></script> <input&nbsp;name="dt"&nbsp;type="radio"&nbsp;id="first"/> <input&nbsp;name="dt"&nbsp;type="radio"&nbsp;id="second"/> <div&nbsp;onclick="i1()">查看1的状态</div> <div&nbsp;onclick="i2()">查看2的状态</div> <div&nbsp;onclick="who()">查看谁被选中</div> <script> const&nbsp;jqDom1&nbsp;=&nbsp;$("#first"); const&nbsp;jqDom2&nbsp;=&nbsp;$("#second"); function&nbsp;i1(){ &nbsp;&nbsp;&nbsp;&nbsp;alert(jqDom1.prop("checked")); }function&nbsp;i2(){ &nbsp;&nbsp;&nbsp;&nbsp;alert(jqDom2.prop("checked")); }function&nbsp;who(){ &nbsp;&nbsp;&nbsp;&nbsp;alert($("input[name='dt']:checked").attr("id")); } </script>

Answer 2

$("input[name='dt']&nbsp;:checked").val();