Temporal.PlainDateTime.prototype.subtract()

The subtract() method of PlainDateTime instances returns a new Temporal.PlainDateTime object representing this date-time moved backward by a given duration (in a form convertible by Temporal.Duration.from()).

If you want to subtract two date-times and get a duration, use since() or until() instead.

Syntax

subtract(duration)
subtract(duration, options)

Parameters

• duration
  • : A string, an object, or a Duration instance representing a duration to subtract from this date-time. It is converted to a Temporal.Duration object using the same algorithm as Temporal.Duration.from().
• options Optional
  • : An object containing the following property:
    • overflow Optional
      • : A string specifying the behavior when a date component is out of range. Possible values are:
        • "constrain" (default)
          • : The date component is clamped to the valid range.
        • "reject"
          • : A RangeError is thrown if the date component is out of range.

Return value

A new Temporal.PlainDateTime object representing the date-time specified by the original PlainDateTime, minus the duration.

Exceptions

• RangeError
  • : Thrown if the result is not in the representable range, which is ±(10⁸ + 1) days, or about ±273,972.6 years, from the Unix epoch.

Description

Subtracting a duration is equivalent to adding its negation, so all the same considerations apply.

Examples

Subtracting a duration

const start = Temporal.PlainDateTime.from("2022-01-01T12:34:56");
const end = start.subtract({
  years: 1,
  months: 2,
  weeks: 3,
  days: 4,
  hours: 5,
  minutes: 6,
  seconds: 7,
  milliseconds: 8,
});
console.log(end.toString()); // 2020-10-07T07:28:48.992

Specifications

Browser compatibility

See also

• PlainDateTime
• Duration
• Temporal.PlainDateTime.prototype.add()
• Temporal.PlainDateTime.prototype.since()
• Temporal.PlainDateTime.prototype.until()