The calendarId accessor property of Temporal.PlainDateTime instances returns a string representing the calendar used to interpret the internal ISO 8601 date.

The toPlainDate() method of Temporal.PlainDateTime instances returns a new Temporal.PlainDate object representing the date part (year, month, day) of this date-time in the same calendar system.

The getTimeZoneTransition() method of Temporal.ZonedDateTime instances returns a Temporal.ZonedDateTime object representing the closest instant after or before this instant at which the time zone's UTC offset changes (the returned instant is the first instant after the change), or null if there is no such transition. This is useful for finding out the offset rules of a time zone, such as its daylight saving time pattern.

The with() method of Temporal.PlainYearMonth instances returns a new Temporal.PlainYearMonth object representing this year-month with some fields replaced by new values. Because all Temporal objects are designed to be immutable, this method essentially functions as the setter for the year-month's fields.

The Atomics.and() static method computes a bitwise AND with a given value at a given position in the array, and returns the old value at that position. This atomic operation guarantees that no other write happens until the modified value is written back.

The Atomics.waitAsync() static method waits asynchronously on a shared memory location and returns an object representing the result of the operation.

The Atomics.wait() static method verifies that a shared memory location still contains a given value and if so sleeps, awaiting a wake-up notification or times out. It returns a string which is either "ok", "not-equal", or "timed-out".

The JSON.isRawJSON() static method tests whether a value is an object returned by JSON.rawJSON().

# Contributors by commit history https://github.com/mdn/content/commits/main/files/en-us/web/javascript/reference/operators/logical_or_assignment/index.md # Original Wiki contributors bershanskiy h...

# Contributors by commit history https://github.com/mdn/content/commits/main/files/en-us/web/javascript/reference/operators/null/index.md # Original Wiki contributors sideshowbarker hinell backbenc...