DisplayValue for custom widget?

I have a few custom widgets and one of them is a widget that adds a the https://flatpickr.js.org/ to the survey.

The user sees a string like: 19 Mar 2018 but the actual value is 2018-03-19.

In my situation the user is selecting a date in step 1 and I would like to show this date later on in one of the steps. This works fine when I use the {field_name} placeholder but it is giving me the value of 2018-03-19 which makes sense because that is the actual value. But I would like to show there the date formatted as 19 Mar 2018.

Is there a way to add equal to checkboxes, radiogroups and selects to have a displayValue property on custom widgets so I can control this output?

[andrewtelnov]

@kaphert You will have to write something like:

//return not null if you want to change the default behavior
getDisplayValue: function(question) {
 return question.value === 1 ? "one" : null;
}

Thank you, Andrew

[andrewtelnov]

@kaphert Yes, you are right. It is better, corrected.

Thank you, Andrew