How to count check-boxes using jQuery?

Question

I have tons of checkboxes that are either checked (checked="checked") or unchecked.

I would like to get the number of all checkboxes, unchecked and checked checkboxes.

With check-box I mean <input type="checkbox" />.

How to do it with jQuery? Thanks in advance!

Answer 1

You could do:

var numberOfChecked = $('input:checkbox:checked').length; var totalCheckboxes = $('input:checkbox').length; var numberNotChecked = totalCheckboxes - numberOfChecked; 

EDIT

Or even simple

var numberNotChecked = $('input:checkbox:not(":checked")').length; 

Answer 2

Assume that you have a tr row with multiple checkboxes in it, and you want to count only if the first checkbox is checked.

You can do that by giving a class to the first checkbox

For example class='mycxk' and you can count that using the filter, like this

$('.mycxk').filter(':checked').length