Temporal.PlainMonthDay.prototype.toJSON()
Limited availability
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The toJSON() method of Temporal.PlainMonthDay instances returns a string representing this month-day 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 month-day in the RFC 9557 format, with the year and calendar annotation included if it is not "iso8601".
Description
The method is automatically called by JSON.stringify() when a Temporal.PlainMonthDay object is encountered during JSON serialization. The serialized value can then be deserialized using the Temporal.PlainMonthDay.from() function within the reviver of JSON.parse().
Examples
Using toJSON()
const md = Temporal.PlainMonthDay.from({ month: 8, day: 1 });
const mdStr = md.toJSON(); // '08-01'
const md2 = Temporal.PlainMonthDay.from(mdStr);
JSON serialization and parsing
This example shows how Temporal.PlainMonthDay can be serialized as JSON without extra effort, and how to parse it back.
const md = Temporal.PlainMonthDay.from({ month: 8, day: 1 });
const jsonStr = JSON.stringify({ birthday: md }); // '{"birthday":"08-01"}'
const obj = JSON.parse(jsonStr, (key, value) => {
if (key === "birthday") {
return Temporal.PlainMonthDay.from(value);
}
return value;
});
Specifications
| Specification |
|---|
| Temporal # sec-temporal.plainmonthday.prototype.tojson |