I'm using the Settings API with some troubles that I'm solving thanks to the help of this community. I want to add a countdown to a page but I'm not sure how to proceed. I've a checkbox in my custom setting spage that will enable or disable the features I want to use on the fornt-end, I want to implement the countdown by adding the needed inputs for months, days and hours, I'm thinking to use a date input type on the backend, but I need some help. I need to understand if the field needs to be registered a part from tha setting field I already have for the checkbox that will enable it. To implement the field, I will chek using jquery the value of the checkbox and then if is checked I will show the input otherwise it will stay disabled. Is this way correct? How I can proceed, please instruct me about the best way.