[Django]-Jquery hidden div remove field required

I have created a fiddle using your code that how you can apply required on the filed.

See this: fiddle example

You need to add two more lines in JS:

$(document).ready(function(){
    $("select").change(function(){
        $(this).find("option:selected").each(function(){
            var optionValue = $(this).attr("value");
            console.log(optionValue);
            if(optionValue){
                $(".col").not("." + optionValue).hide();
                $("." + optionValue).show();
                                $('input[type="text"]').removeAttr('required');
                                $("." + optionValue + " input").attr('required','true');
            } else{
                $(".col").hide();

            }
        });
    }).change();
});