javascript - 我怎么知道通过jQuery选择了哪个单选按钮？(How can I know which radio button is selected via jQuery?)

Question

I have two radio buttons and want to post the value of the selected one.

(我有两个单选按钮，想要发布所选一个的值。)

How can I get the value with jQuery?

(如何使用jQuery获得价值？)

I can get all of them like this:

(我可以像这样得到所有这些：)

$("form :radio")

How do I know which one is selected?

(我怎么知道选择了哪一个？)

  ask by juan translate from so

Answer 1

To get the value of the selected radioName item of a form with id myForm :

(要获取ID为myForm的表单的选定 radioName项目的值：)

$('input[name=radioName]:checked', '#myForm').val()

Here's an example:

(这是一个例子：)

 $('#myForm input').on('change', function() { alert($('input[name=radioName]:checked', '#myForm').val()); }); 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <form id="myForm"> <input type="radio" name="radioName" value="1" /> 1 <br /> <input type="radio" name="radioName" value="2" /> 2 <br /> <input type="radio" name="radioName" value="3" /> 3 <br /> </form>