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Polyfill: Align ZonedDateTime.p.toPlain{YearMonth,MonthDay} with spec #2677

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merged 1 commit into from
Sep 19, 2023
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Polyfill: Align ZonedDateTime.p.toPlain{YearMonth,MonthDay} with spec #2677

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6 changes: 4 additions & 2 deletions polyfill/lib/zoneddatetime.mjs
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Original file line number Diff line number Diff line change
Expand Up @@ -565,16 +565,18 @@ export class ZonedDateTime {
}
toPlainYearMonth() {
if (!ES.IsTemporalZonedDateTime(this)) throw new TypeError('invalid receiver');
const dt = dateTime(this);
const calendar = GetSlot(this, CALENDAR);
const fieldNames = ES.CalendarFields(calendar, ['monthCode', 'year']);
const fields = ES.PrepareTemporalFields(this, fieldNames, []);
const fields = ES.PrepareTemporalFields(dt, fieldNames, []);
return ES.CalendarYearMonthFromFields(calendar, fields);
}
toPlainMonthDay() {
if (!ES.IsTemporalZonedDateTime(this)) throw new TypeError('invalid receiver');
const dt = dateTime(this);
const calendar = GetSlot(this, CALENDAR);
const fieldNames = ES.CalendarFields(calendar, ['day', 'monthCode']);
const fields = ES.PrepareTemporalFields(this, fieldNames, []);
const fields = ES.PrepareTemporalFields(dt, fieldNames, []);
return ES.CalendarMonthDayFromFields(calendar, fields);
}
getISOFields() {
Expand Down