How to validate a moment.js duration?

Question

It seems like only a moment() object has a isValid() method to check the validity of the provided data. Is there any equivalent for the moment.duration() object? Because isValid() does not seem to exist on durations.

Answer 1

I agree this seems to be an omission in moment. I have come up with the following workaround method of validating durations since I had the need. The insight is that an invalid duration, results an a duration that is exactly 'P0D'. Just sharing that here:

durationIsValid(iso8601DurationString){
  if(iso8601DurationString === 'P0D') return true;
  return moment.duration(iso8601DurationString).toISOString() !== 'P0D';
}

Hope this helps!