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

Syntax

toJSON()

Parameters

None.

Return value

A string representing the given date in the RFC 9557 format, with the calendar annotation included if it is not "iso8601".

Description

The toJSON() method is automatically called by JSON.stringify() when a Temporal.PlainDate object is stringified. This method is generally intended to, by default, usefully serialize Temporal.PlainDate objects during JSON serialization, which can then be deserialized using the Temporal.PlainDate.from() function as the reviver of JSON.parse().

Examples

Using toJSON()

const date = Temporal.PlainDate.from({ year: 2021, month: 8, day: 1 });
const dateStr = date.toJSON(); // '2021-08-01'
const d2 = Temporal.PlainDate.from(dateStr);

JSON serialization and parsing

This example shows how Temporal.PlainDate can be serialized as JSON without extra effort, and how to parse it back.

const date = Temporal.PlainDate.from({ year: 2021, month: 8, day: 1 });
const jsonStr = JSON.stringify({ date }); // '{"date":"2021-08-01"}'
const obj = JSON.parse(jsonStr, (key, value) => {
  if (key === "date") {
    return Temporal.PlainDate.from(value);
  }
  return value;
});

Specifications

Browser compatibility

See also

• Temporal.PlainDate
• Temporal.PlainDate.from()
• Temporal.PlainDate.prototype.toString()
• Temporal.PlainDate.prototype.toLocaleString()