#651: Create ISO 8601 Date/Time Values w/o Milliseconds

[nbcarey]

This addresses Issue #651 (Feature request - function to quickly create ISO8601 stamp without milliseconds).

It adds a precision option, the domain of which is hours, minutes, seconds, milliseconds, defaulting to milliseconds. Time components of higher precision than that specified are simply omitted: no attempt is made at rounding.

If precision is specified in addition to suppressSeconds or suppressMilliseconds, the suppress* option wins:

DateTime.utc({2020,7,25,12,34,0,0}).toISO({ precision: 'millisecond',  suppressSeconds: true })

returns 2020-07-25T12:34Z.

Millisecond precision was requested, with the proviso that seconds and milliseconds won't be rendered if they are both zero.

Note: It might be a nice TO DO to add an auto precision that would set the precision level to omit trailing components whose value is zero, so

Datetime.utc({2020, 7, 25, 12, 34, 0, 0}).toISO({ precision: "auto" })

would return 12:34Z.

[jsf-clabot]

All committers have signed the CLA.

[loynoir]

Hi, developers.

Will this useful pull be merged?

Maybe stripMilliseconds?

• Less than 0.5, 11:22:33.444 -> 11:22:33
• Larger than 0.5, 11:22:33.666 -> 11:22:33

[ahmetzambak]

Still missing that feature..

[icambron]

To anyone finding this: this PR just needs a little work, as detailed in the comments. If you do that work, I'll merge it! In the meantime, asking for it more isn't going to help.