Parameter is not sent to Laravel route in Ajax

javascript php ajax laravel laravel-5.8

PHP Snippet 1:

let url = "{{ route('payCourseRegistrationWithDiscount',['course'=>$item->cor_id,'value'=>':cartValueDiscountedWithCode']) }}";
url = url.replace(':cartValueDiscountedWithCode', data.cartValueDiscountedWithCode);
window.location.href = url;

PHP Snippet 2:

window.location.href = {{route('payCourseRegistrationWithDiscount', ['course'=>$item->cor_id]) }}}+'/'+data.cartValueDiscountedWithCode