Proposal for JS for implementing .now() without tzdb for all "time" classes except for ZonedDateTime

[gatisnolv]

With these helpers on JS (browsers, node.js), we obtain an OffsetDateTime.now() equivalent (of course up to millisecond resolution due to JS nature) without the need to add tzdb. This unlocks all of {LocalDate, LocalDateTime, LocalTime, MonthDay, OffsetDateTime, OffsetTime, Year, YearMonth}.now() straightforward implementations in terms of the OffsetDateTime.now() instance. And only ZonedDateTime, which intuitively should be the only one that requires actual tz data is left with that need.

def utcOffsetSeconds(ms: Long) = -new Date(ms.toDouble).getTimezoneOffset().toInt * 60

def offsetDateTimeInDefaultTimeZone(instant: Instant) = instant.atOffset(ZoneOffset.ofTotalSeconds(utcOffsetSeconds(instant.toEpochMilli)))

def offsetDateTimeInDefaultTimeZoneNow() = offsetDateTimeInDefaultTimeZone(Instant.now())

What do you think about this?

[gatisnolv]

@cquiroz Care to comment?

[cquiroz]

Hi

Sorry I've been quite busy lately, this sounds intriguing

Have you thought how would it affect scala-native?