Temporal.PlainDate.prototype.valueOf()

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

experimental technology
Check the Browser compatibility table carefully before using this in production.

The valueOf() method of implicitly converted to primitives when used in arithmetic or comparison operations.

Syntax

valueOf()

Parameters

None.

Return value

None.

Exceptions

TypeError: Always thrown.

Description

Because both Temporal.PlainDate.compare() static method to compare them.

Examples

Arithmetic and comparison operations on Temporal.PlainDate

All arithmetic and comparison operations on Temporal.PlainDate instances should use the dedicated methods or convert them to primitives explicitly.

const date1 = Temporal.PlainDate.from("2022-01-01");
const date2 = Temporal.PlainDate.from("2022-07-01");
date1 > date2; / TypeError: can't convert PlainDate to primitive type
Temporal.PlainDate.compare(date1, date2); / -1

date2 - date1; / TypeError: can't convert PlainDate to primitive type
date2.since(date1).toString(); / "P181D"

Specifications

Specification
Temporal # sec-temporal.plaindate.prototype.valueof