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The number of checkbox check for a particular class

I have some flags on my page, some of these flags have "myClassA" or "myClassB".

I want to set the number fo checkbox flag, but only for the flag with class = "myClassA"

Thank,

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5 answers

Try the following:

$('input:checkbox.myClassA:checked').length
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try it

made jsFiddle from another zip code

http://jsfiddle.net/8n6Rp/

$(function(){
    alert( $(".myClassA:checkbox:checked").length );
});
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:

var classAChecked = $(".myClassA:checkbox:checked").size();

:checkbox , :checked .

,

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<input type='checkbox' checked='checked' class='A' />
<input type='checkbox' class='A' />
<input type='checkbox' checked='checked' class='A' />
<input type='checkbox' checked='checked' class='A' />
<input type='checkbox' checked='checked' class='A' />

<input type='checkbox' checked='checked' class='B' />
<input type='checkbox' checked='checked' class='B' />
<input type='checkbox' checked='checked' class='B' />

4 class= "A"

alert($('.A:checked').length)
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. , .

var numberOfChecked = $(divId).find(".checkbutton").find(":checkbox:checked").length;
alert(numberOfChecked);
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