I've got a list of ISO 8601-compatible strings, some of which are dates (like '2022-12-25'), some are date-time values (like '2022-12-25T12:00'), and some have time zone info (like '2022-12-25T12:00-08:00[America/Los_Angeles]'.
Using the new Temporal API that's coming to JavaScript, is there one function I can call to parse all these strings into their corresponding Temporal types like Temporal.PlainDate, Temporal.PlainDateTime, Temporal.ZonedDateTime, etc.?
No, there is not a universal parse-into-any-Temporal-type function that's built into the language.
This is because the same string can be used to parse many different Temporal types.
To parse a string into a Temporal type, you must know ahead of time what type you want.
For example, 2020-04-25[u-ca=hebrew] can be successfully parsed by Temporal.PlainDate.from, Temporal.PlainMonthDay.from, Temporal.PlainYearMonth.from, or even Temporal.PlainDateTime.from.
This ambiguity requires choosing a Temporal type before parsing.