I.e., variable and tag:
-bool checkboxvalue = false;
input(name="nameof_checkbox", required, type="checkbox")
but sometimes (if checkbox_value == true) it should be:
input(name="nameofcheckbox", required, type="checkbox", checked)
(for example, if I show form again and want to help user with values what he entered earlier)
It should always be two differend tags or I can write something like:
input(name="nameofcheckbox", required, type="checkbox" (checkbox_value ? ", checked", "") )
?