JQuery - find a radio button by value

How would I use JQuery to开发者_如何学Go find a radio button by its value?

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Try this:

$(":radio[value=foobar]")

This will select all radio buttons with the attribute value="foobar".

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I'm using jQuery 1.6 and this did not work for me: $(":radio[value=foobar]").attr('checked',true);

Instead, I'm using: $('[value="foobar"]').attr('checked',true); and it works great.

The actual code I'm using clears the radios first and uses prop instead of attr

$('[name=menuRadio]').prop('checked',false);

$('[name=menuRadio][value="Bar Menu"]').prop('checked',true);

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This can be achieved by this too:

$('input[type="radio"][value="aaa"]').val();

This will select the radio which has the value of aaa

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With .filter() method:

var radio =  $('input[type="radio"]').filter(function(){
                       return this.value === 'aaa';
                      }).val();

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say you have something like this in the HTML:

<fieldset>
    <input type="radio" name="UI_opt" value="alerter" checked> Alerter<br/>
    <input type="radio" name="UI_opt" value="printer"> Printer<br/>
    <input type="radio" name="UI_opt" value="consoler"> Consoler<br/>
</fieldset>

then this sort of thing works.

$("fieldset input[name='UI_opt'][checked]").val()

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A full selector would look like this:

bool shipToBilling = $("[name=ShipToBillingAddress][value=True]")

given that you probably have more than one radio button group like this

<input name="ShipToBillingAddress" type="radio" value="True" checked="checked">
<input name="ShipToBillingAddress" type="radio" value="False">

<input name="SomethingElse" type="radio" value="True" checked="checked">
<input name="SomethingElse" type="radio" value="False">

Using an ID selector like this (next example) is bad because you shouldn't have multiple elements with the same ID. I assume someone finding this question already knows this is bad.

$("#DidYouEnjoyTheMovie:radio[value=yes]")

The following about :radio may or may not be of interest

Because :radio is a jQuery extension and not part of the CSS specification, queries using :radio cannot take advantage of the performance boost provided by the native DOM querySelectorAll() method. For better performance in modern browsers, use [type="radio"] instead.