Why isn’t my checkbox change event triggered?

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The change event does not fire when you programmatically change the value of a check box. What you can do to ensure it fires is:

 $(":checkbox").parent().click(function(evt) {
    if (evt.target.type !== 'checkbox') {
        var $checkbox = $(":checkbox", this);
        $checkbox.attr('checked', !$checkbox.attr('checked'));
        $checkbox.change();
    }
});

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