I’m trying to establish a cookie upon form submission. How can I ensure the cookie is set on the thank you page when a user submits the form from a different page?

Form exists on http://www.example.com/

Cookie to be creatd on http://www.example.com/thank-you

Below is the code I am currently using

jQuery.ajax({
        type: 'POST',
        url: actionURL,
        
         data: form.serialize(),
         dataType: 'json',
        success: function(json) {
            window.location.href = "http://www.example.com/";
$.cookie("newcookie", "new", { path: "/thank-you", expires: 365 });
           
        }
    })