13 lines
577 B
JavaScript
13 lines
577 B
JavaScript
import { toGregorianDate, toHebrewDate } from "../utils/dateConversion.js";
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import { clampHebrewDay, monthIndexToHebrewDate, monthsSinceEpoch, } from "../utils/serial.js";
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export function addMonths(date, amount) {
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if (amount === 0) {
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return new Date(date.getTime());
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}
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const hebrew = toHebrewDate(date);
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const targetIndex = monthsSinceEpoch(hebrew) + amount;
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const target = monthIndexToHebrewDate(targetIndex, hebrew.day);
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const day = clampHebrewDay(target.year, target.monthIndex, target.day);
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return toGregorianDate({ ...target, day });
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}
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