if not disabled jquery code example
Example 1: jquery option not disabled
const opt = $('#select option:not(:disabled)');
const first = $($('#select option:not(:disabled)')[0]);
Example 2: not disabled jquery
$(document).ready(function(){
$(':checkbox.selectall').on('click', function(){
$(':checkbox[class='+ $(this).data('checkbox-name') + ']:not(:disabled)').prop("checked", $(this).prop("checked"));
$(':checkbox[class='+ $(this).data('checkbox-name') + ']:not(:disabled)').trigger("change");
});
});