calculate the number of html checkbox checked using jquery

Question

how can i calculate the number of checkboxes that a user has checked using jquery?

what i want to do is limiting the number of checking for checkboxes in a form to 10 for example and when a user exceeds this range display a warning message.

Answer 1

There are multiple methods to do that:

Method 1:

alert($('.checkbox_class_here:checked').size());

Method 2:

alert($('input[name=checkbox_name]').attr('checked'));

Method: 3

alert($(":checkbox:checked").length);