What are functions replaced with in Typescript ?

Question

Hi ,

I am migrating code from Javascript to TypeScript 

 

I have the following

 

function myDateDialog()

{

var retDay;

var retMonth;

var retYear;

}

function openDatePickerDialog(wnd, field, dateFormat) {

myDateDialog.retDay = "";

myDateDialog.retMonth = "";

myDateDialog.retYear = "";

var dlgURL = '../DatePicker.htm';

field.value = dateFormat.replace(/yyyy/, myDateDialog.retYear).replace(/MM/, myDateDialog.retMonth).replace(/dd/, myDateDialog.retDay);

 

what would be the best to replace the Javascript code  

function myDateDialog() , would a class be best and declare  retDay , retMonth and retYear as properties ?

 

Then instantiate the class in  openDatePickerDialog and set the properties values ?

 

or is there a better approach ?

  

Thanks