Knockout date validation not working correctly

Question

I need to validate date in localized format (SK) and it is not possible with knockout validation.

I am using: Durandal 1.2.0 Knockout 2.3.0 Knockout validation https://g

Answer 1

A little late by why not... The date rule does seem a bit too permissive for my uses as well. If you like moment but want something cleaner for the caller, add your rule to the validation.rules object:

ko.validation.rules['simpleDate'] = {
    validator: function (val, validate) {
        return ko.validation.utils.isEmptyVal(val) || moment(val, 'MM/DD/YYYY').isValid();
    },
    message: 'Invalid date'
};

And then use it like:

var someDate= ko.observable().extend({ simpleDate: true });