Function formatYear

components/dash-core-components/src/utils/calendar/helpers.ts:251–257

(year: number, formatStr?: string)

 * Formats a year according to the year format extracted from month_format.
 */
export function formatYear(year: number, formatStr?: string): string {
    const {yearFormat} = extractFormats(formatStr);
    const convertedFormat = convertFormatTokens(yearFormat);
    return format(new Date(year, 0, 1), convertedFormat, {
        locale: getUserLocale(),
    });
}

/**
 * Parses a year string and converts it to a full 4-digit year.