Temporal.PlainDate.prototype.toJSON()

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Syntax#
Parameters#
Return value#
Description#
Examples#
Using toJSON()#
JSON serialization and parsing#
Specifications#
Browser compatibility#
See also#

The toJSON() method of {{jsxref("Temporal.PlainDate")}} instances returns a string representing this date in the same RFC 9557 format as calling {{jsxref("Temporal/PlainDate/toString", "toString()")}}. It is intended to be implicitly called by {{jsxref("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 {{jsxref("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 {{jsxref("Temporal/PlainDate/from", "Temporal.PlainDate.from()")}} function as the reviver of {{jsxref("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;
});