Moment: How to prevent “Invalid date”?

Source: https://stackoverflow.com/questions/28993107/momentjs-how-to-prevent-invalid-date

If your goal is to find out whether you have a valid date, use Moment's isValid:

var end_date_moment, end_date;
jsonNC.end_date = jsonNC.end_date.replace(" ", "T");
end_date_moment = moment(jsonNC.end_date);
end_date = end_date_moment.isValid() ? end_date_moment.format("L") : "";

...which will use "" for the end_date string if the date is invalid.