In jQuery, how do I select an element by its name attribute?

Question

I have 3 radio buttons in my web page, like below:

<label for="theme-grey">
  <input type="radio" id="theme-grey" name="theme" value="grey" />Grey</label>
<label for="theme-pink">
  <input type="radio" id="theme-pink" name="theme" value="pink" />Pink</label>
<label for="theme-green">
  <input type="radio" id="theme-green" name="theme" value="green" />Green</label>

In jQuery, I want to get the value of the selected radio button when any of these three are clicked. In jQuery we have id (#) and class (.) selectors, but what if I want to find a radio button by its name, as below?

$("<radiobutton name attribute>").click(function(){});

Please tell me how to solve this problem.

Marc

you don't strictly need to specify the attribute 'for', as long as the fields are included between their corresponding 'label' tags – Kilgore

jQuery 1.8 and above changes this.... I added an answer below explaining. – Dionne

A1rPun's answer is the best: a non-jQuery one-liner! – Harriette

Used a radio button for maintaining state in my js app. Debugged for a good one hour before checking this thread. Check this out – Fey

In plain JS: document.querySelectorAll("input:radio[name=theme]").forEach(function() { this.onclick=function() { var value = this.value; }; }); – Shane

Answer 1

This should do it, all of this is in the documentation, which has a very similar example to this:

$("input[type='radio'][name='theme']").click(function() {
    var value = $(this).val();
});

I should also note you have multiple identical IDs in that snippet. This is invalid HTML. Use classes to group set of elements, not IDs, as they should be unique.

Phosphor

@gargantaun - if you click a radio button, what happens to it? – Phosphor

Good point. Although it's still not "How to get selected radiobutton value using its name in jQuery?". It's "How to get selected radiobutton value when clicking on it using jQuery?". A small difference, but one that baffled me for a bit. – Wilfredwilfreda

According to the question this answer is correct. in global view we go for clayton's answer. – Overplus

This was not the answer I was looking for because it still took the value of the first radio button in the list. The answer below is the correct answer. – Dorice

@AdamLevitt: You don't understand the question and/or the answer if you think this answer is wrong. – Phosphor

As of jQuery 1.8 use [type='radio'] instead of :radio that way jQuery can take advantage of the performance boost provided by the native DOM querySelectorAll() method. – Regrate

@PaoloBergantino answer is 100% correct because it returns the value after clicking the desired radio button.@Clayton Rabenda answer does not give this. – Exalted

Answer 2

To determine which radio button is checked, try this:

$('input:radio[name=theme]').click(function() {
  var val = $('input:radio[name=theme]:checked').val();
});

The event will be caught for all of the radio buttons in the group and the value of the selected button will be placed in val.

Update: After posting I decided that Paolo's answer above is better, since it uses one less DOM traversal. I am letting this answer stand since it shows how to get the selected element in a way that is cross-browser compatible.

Micahmicawber

Base don how I READ the question, this was the answer I needed. :checked is what i was missing in my equation. Thanks. – Neopythagoreanism

As of jQuery 1.8 use [type='radio'] instead of :radio that way jQuery can take advantage of the performance boost provided by the native DOM querySelectorAll() method. – Regrate

I gave a space after colon and before "checked" by mistake. So please make sure there is no space. – Barrator

A useful answer for those not wanting to get the value from a click event handler. Otherwise, you must use :checked to find which button is checked, for example, with a form submit event handler where the this keyword does not map to the clicked button. – Piggish

Answer 3

$('input:radio[name=theme]:checked').val();

Heaves

I went on simply with $("input[name=theme]:checked").val(); (leaving the :radio part out and it seems to work fine in IE, FF, Safari and Chrome. I had to work with jQ v 1.3... Of course, that means there is only one element named 'theme' – Bidet

This is the best answer IMO, it says "get me the value of the CHECKED radio with THIS name". No need for events, etc. – Bandy

Answer 4

another way

$('input:radio[name=theme]').filter(":checked").val()

Toneme

This one is useful if you are interested in grabbing the value +1 – Teamster

This is solid because you can use a variable to keep the radio buttons, e.g. $themeRadios = $('input:radio[name=theme']) to set any event handlers and then get the value by using the filter, e.g. $themeRadios.filter(":checked").val(). – Mathilda

Answer 5

This works great for me. For example you have two radio buttons with the same "name", and you just wanted to get the value of the checked one. You may try this one.

$valueOfTheCheckedRadio = $('[name=radioName]:checked').val();

Eunaeunice

The reason this answer is better than the currently-accepted 230+ upvoted answer is because this answer also accounts for when the user interacts with a radio button by keyboard. – Jaffna

Answer 6

The following code is used to get the selected radio button value by name

jQuery("input:radio[name=theme]:checked").val();

Thanks Adnan

Boschvark

hmm .. didn't I fix your code formatting in your last reply? Please take care of it yourself :-) – Cavorelievo

Answer 7

For anyone who doesn't want to include a library to do something really simple:

document.querySelector('[name="theme"]:checked').value;

jsfiddle

For a performance overview of the current answers check here

Mcanally

Thanks for this answer. Because I was unable to get the accepted answer to work in any form. – Preeminence

Answer 8

I found this question as I was researching an error after I upgraded from 1.7.2 of jQuery to 1.8.2. I'm adding my answer because there has been a change in jQuery 1.8 and higher that changes how this question is answered now.

With jQuery 1.8 they have deprecated the pseudo-selectors like :radio, :checkbox, :text.

To do the above now just replace the :radio with [type=radio].

So your answer now becomes for all versions of jQuery 1.8 and above:

$("input[type=radio][name=theme]").click(function() { 
    var value = $(this).val(); 
}); 

You can read about the change on the 1.8 readme and the ticket specific for this change as well as a understand why on the :radio selector page under the Additional Information section.

Dionne

:checked is not deprecated. So you can use $("input[type='radio'][name='theme']:checked") – Regrate

Answer 9

If you'd like to know the value of the default selected radio button before a click event, try this:

alert($("input:radio:checked").val());

Crimson

Answer 10

You can use filter function if you have more than one radio group on the page, as below

$('input[type=radio]').change(function(){
    var value = $(this).filter(':checked' ).val();
    alert(value);
});

Here is fiddle url

http://jsfiddle.net/h6ye7/67/

Masefield

Answer 11

<input type="radio" name="ans3" value="help"> 
<input type="radio" name="ans3" value="help1">
<input type="radio" name="ans3" value="help2">

<input type="radio" name="ans2" value="test"> 
<input type="radio" name="ans2" value="test1">
<input type="radio" name="ans2" value="test2">

<script type="text/javascript">
  var ans3 = jq("input[name='ans3']:checked").val()
  var ans2 = jq("input[name='ans2']:checked").val()
</script>

Vigilant

Answer 12

If you want a true/false value, use this:

  $("input:radio[name=theme]").is(":checked")

Chavira

Answer 13

Something like this maybe?

$("input:radio[name=theme]").click(function() { 
 ...
}); 

When you click on any radio button, I believe it will end up selected, so this is going to be called for the selected radio button.

Tripartite

The @ is invalid as of jQuery 1.3 (deprecated prior to that, even). blog.jquery.com/2009/01/05/help-test-jquery-13-beta-2 "Old, XPath, style attribute selectors: [@attr=value]. These have been deprecated for quite some time - and we’re finally removing them. To fix it just remove the @!" – Rachal

Answer 14

I you have more than one group of radio buttons on the same page you can also try this to get the value of radio button:

$("input:radio[type=radio]").click(function() {
    var value = $(this).val();
    alert(value);
});

Cheers!

Undercurrent

Answer 15

can also use a CSS class to define the range of radio buttons and then use the following to determine the value

$('.radio_check:checked').val()

Indemnification

Answer 16

This worked for me..

HTML:

<input type="radio" class="radioClass" name="radioName" value="1" />Test<br/>
<input type="radio" class="radioClass" name="radioName" value="2" />Practice<br/>
<input type="radio" class="radioClass" name="radioName" value="3" />Both<br/>

Jquery:

    $(".radioClass").each(function() {
        if($(this).is(':checked'))
        alert($(this).val());
    });

Hope it helps..

Syndrome

Answer 17

$('input:radio[name=theme]').bind(
  'click',
  function(){
    $(this).val();
});

Cash

Answer 18

You might notice using class selector to get value of ASP.NET RadioButton controls is always empty and here is the reason.

You create RadioButton control in ASP.NET as below:

<asp:RadioButton runat="server" ID="rbSingle" GroupName="Type" CssClass="radios" Text="Single" />
<asp:RadioButton runat="server" ID="rbDouble" GroupName="Type" CssClass="radios" Text="Double" />
<asp:RadioButton runat="server" ID="rbTriple" GroupName="Type" CssClass="radios" Text="Triple" />

And ASP.NET renders following HTML for your RadioButton

<span class="radios"><input id="Content_rbSingle" type="radio" name="ctl00$Content$Type" value="rbSingle" /><label for="Content_rbSingle">Single</label></span>
<span class="radios"><input id="Content_rbDouble" type="radio" name="ctl00$Content$Type" value="rbDouble" /><label for="Content_rbDouble">Double</label></span>
<span class="radios"><input id="Content_rbTriple" type="radio" name="ctl00$Content$Type" value="rbTriple" /><label for="Content_rbTriple">Triple</label></span>

For ASP.NET we don't want to use RadioButton control name or id because they can change for any reason out of user's hand (change in container name, form name, usercontrol name, ...) as you can see in code above.

The only remaining feasible way to get the value of the RadioButton using jQuery is using css class as mentioned in this answer to a totally unrelated question as following

$('span.radios input:radio').click(function() {
    var value = $(this).val();
});

Electrocardiogram