Get checkbox value with jQuery

Question

First I alert this, and alert 'undefined':

alert($("input[name='searchManagers']:checked").val());

But when I try this, why alert 'no':

if($("input[name='searchManagers']:checked").val() == 'undefined') alert('yes') else alert('no')

That fix my problem:

if(typeof $("input[name='searchManagers']:checked").val() == 'undefined') alert('yes') else alert('no')

Change it to if(typeof $("input[name='searchManagers']:checked").val() == 'undefined') - what happens now? — chrisfrancis27
– chrisfrancis27, Commented Sep 21, 2012 at 11:42
try this :) some html could help btw :) $("input[name='searchManagers']").is( ':checked' ); — OctoD
– OctoD, Commented Sep 21, 2012 at 11:42
Try this on: [stackoverflow.com/questions/426258/… [1]: stackoverflow.com/questions/426258/… — Prasath Albert
– Prasath Albert, Commented Sep 21, 2012 at 11:45

Brett Zamir · Accepted Answer · 2012-09-21 11:41:48Z

The second one you are comparing to a string instead of the undefined type.

Try this:

if($("input[name='searchManagers']:checked").val() == undefined)

or:

if(typeof $("input[name='searchManagers']:checked").val() == 'undefined')

Mustafa Genç · Accepted Answer · 2012-09-21 11:49:39Z

2

Use:

$("input[name='searchManagers']").is(":checked")

answered Sep 21, 2012 at 11:43

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Comments

DeadAlready · Accepted Answer · 2012-09-21 11:42:12Z

Because undefined != 'undefined' If you were to modify your code

 if($("input[name='searchManagers']:checked").val() == undefined) alert('yes') else alert('no')

Then it should work

Om3ga · Accepted Answer · 2012-09-21 11:42:21Z

change 'undefined' to undefined without quotes

if($("input[name='searchManagers']:checked").val() == undefined)

Prathap · Accepted Answer · 2012-09-21 11:45:17Z

Please make sure set the id and name property in check box. And try below the code.

if(!$("input[name='searchManagers']:checked").val()){ alert('Plase select the searchManagers'); return false; }

Arun Manjhi · Accepted Answer · 2012-09-21 11:58:09Z

Please make some changes and find the output.

 if ($("input[name='searchManagers']").is(':checked')) alert('yes'); else alert('no');