Should `fractionalDigits` be called `fractionalSecondDigits` instead?

[longlho]

To be consistent with Intl.DateTimeFormat?

[ben-allen]

fractionalDigits has that name because seconds isn't the only unit that can have associated fractional digits. For example, if milliseconds is the largest unit displayed in the "numeric" style, then the fractional digits representing microseconds and nanoseconds will get appended to milliseconds, not to seconds.

[longlho]

Gotcha thanks!