Add a multi-value with addPropertyWithValue

[radarfox]

Is it possible to add multiple values by this method? For example, to EXDATE where you can add a comma delimited list of dates. I would expect something like this to work:

const vevent = new ICAL.Component('vevent');
vevent.addPropertyWithValue([new ICAL.Time({year: 2020}), new ICAL.Time({year: 2021})]);

But this will produce the following error:

TypeError: property[0].toUpperCase is not a function

I ended up using the lower-level method:

function createExdateProperty (times) {
  const strings = times.map((time) => time.toICALString());
  return new this.ICAL.Property(['exdate', {}, 'date-time', ...strings]);
}

Maybe would you consider adding something like addPropertyWithMultiValue, or allow to pass an array to addPropertyWithValue, for the multi-value components?

[kewisch]

Not possible with that function. if times are ICAL.Property already you want:

const vevent = new ICAL.Component('vevent');
const exdate = new ICAL.Property('exdate');
exdate.setValues(times);
vevent.addProperty(exdate);

[kewisch]

Added example to https://github.com/kewisch/ical.js/wiki/Creating-iCalendar