The total() method of Temporal.Duration instances returns a number representing the total duration in the given unit.

The microseconds accessor property of Temporal.Duration instances returns an integer representing the number of microseconds in the duration.

The subtract() method of Temporal.Duration instances returns a new Temporal.Duration object with the difference between this duration and a given duration. It is equivalent to adding the negated value of the other duration.

The with() method of Temporal.Duration instances returns a new Temporal.Duration object representing this duration 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 duration's fields.

The months accessor property of Temporal.Duration instances returns an integer representing the number of months in the duration.

The days accessor property of Temporal.Duration instances returns an integer representing the number of days in the duration.

The minutes accessor property of Temporal.Duration instances returns an integer representing the number of minutes in the duration.

The Temporal.Now.zonedDateTimeISO() static method returns the current date and time as a Temporal.ZonedDateTime object, in the ISO 8601 calendar and the specified time zone.

Functions are one of the fundamental building blocks in JavaScript. A function in JavaScript is similar to a procedure—a set of statements that performs a task or calculates a value, but for a procedure to qualify as a function, it should take some input and return an output where there is some obvious relationship between the input and the output. To use a function, you must define it somewhere in the scope from which you wish to call it.

This chapter documents all of JavaScript's standard, built-in objects, including their methods and properties.