P1111111111 is valid and shouldn't be

[keenahn]

nesh> const { parse } = require('iso8601-duration')
undefined
nesh> parse('P1111111111')
{ weeks: 0,
  years: 0,
  months: 0,
  days: 0,
  hours: 0,
  minutes: 0,
  seconds: 0 }

[keenahn]

Same with PD or even just P

nesh> parse('PD')
{ weeks: 0,
  years: 0,
  months: 0,
  days: 0,
  hours: 0,
  minutes: 0,
  seconds: 0 }
nesh> parse('P')
{ weeks: 0,
  years: 0,
  months: 0,
  days: 0,
  hours: 0,
  minutes: 0,
  seconds: 0 }

These should throw IMO

[hlerebours]

I agree that there is a bug here. Or two:

• The current implementation tolerates any input that contains a valid duration.
• "P" is considered valid in itself.

=> Any string containing a "P" is considered a valid ISO duration, which is obviously not true (is "API" a valid duration?).