The until() method of Temporal.PlainYearMonth instances returns a new Temporal.Duration object representing the duration from this year-month to another year-month (in a form convertible by Temporal.PlainYearMonth.from()). The duration is positive if the other month is after this month, and negative if before.

This method does other - this. To do this - other, use the since() method.

Syntax

until(other)
until(other, options)

Parameters

other

A string, an object, or a Temporal.PlainYearMonth instance representing a year-month to subtract this year-month from. It is converted to a Temporal.PlainYearMonth object using the same algorithm as Temporal.PlainYearMonth.from(). It must have the same calendar as this.

options Optional

The same options as since().

Return value

A new Temporal.Duration object representing the duration from this year-month until other. The duration is positive if other is after this year-month, and negative if before.

Exceptions

RangeError

Thrown in one of the following cases:

• other has a different calendar than this.
• Any of the options is invalid.

Examples

Using until()

const launch = Temporal.PlainYearMonth.from("2035-01");
const now = Temporal.Now.plainDateISO().toPlainYearMonth();
const duration = now.until(launch);
console.log(`It will be ${duration.toLocaleString("en-US")} until the launch`);

For more examples, see since().

Specifications

Browser compatibility

See also

• Temporal.PlainYearMonth
• Temporal.Duration
• Temporal.PlainYearMonth.prototype.add()
• Temporal.PlainYearMonth.prototype.subtract()
• Temporal.PlainYearMonth.prototype.since()