JsSimpleDateFormat is for formatting and parsing date-time and duration. It formats a Date object
to be a string as the defined pattern. It can also parse a string to be a Date object based on
the defined pattern. It supports the pattern which is compatible with Java SimpleDateFormat and .Net
DateTime. For duration, it extends the pattern used by .Net TimeSpan. By using the same pattern
as those used by Java or .Net, it can be a benefit if you develop the backend application using Java or .Net.
For further information, please read the documentation.