The Temporal.Instant.compare() static method returns a number (-1, 0, or 1) indicating whether the first instant comes before, is the same as, or comes after the second instant. It is equivalent to comparing the epochNanoseconds of the two instants.

The toJSON() method of Temporal.PlainYearMonth instances returns a string representing this year-month in the same RFC 9557 format as calling toString(). It is intended to be implicitly called by JSON.stringify().

The daysInWeek accessor property of Temporal.ZonedDateTime instances returns a positive integer representing the number of days in the week of this date. It is calendar-dependent.

The shift() method of Array instances removes the first element from an array and returns that removed element. This method changes the length of the array.

The entries() method of Array instances returns a new array iterator object that contains the key/value pairs for each index in the array.

The findLast() method of Array instances iterates the array in reverse order and returns the value of the first element that satisfies the provided testing function. If no elements satisfy the testing function, undefined is returned.

The keys() method of Array instances returns a new array iterator object that contains the keys for each index in the array.

The big() method of String values creates a string that embeds this string in a <big> element (<big>str</big>), which causes this string to be displayed in a big font.

The String.raw() static method is a tag function of template literals. This is similar to the r prefix in Python, or the @ prefix in C# for string literals. It's used to get the raw string form of template literals — that is, substitutions (e.g., ${foo}) are processed, but escape sequences (e.g., \n) are not.

The toString() method of String values returns this string value.