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@burglekitt/gmt

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Temporal-based date and time utilities with timezone support and polyfill integration

github.com/burglekitt/gmt

burglekitt/gmt

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/** * Return the number of days in the month containing `value`. * * - 28–31 depending on the month; February varies by leap year. * - Returns null on invalid input. * * @param value ISO PlainDate string * @returns number of days in the month (28-31), or null on invalid input * * @example getDaysInMonth("2024-02-15") // 29 (leap year) * @example getDaysInMonth("2023-02-15") // 28 * @example getDaysInMonth("2024-04-01") // 30 * @example getDaysInMonth("2024-01-01") // 31 * @example getDaysInMonth("invalid") // null */ export declare function getDaysInMonth(value: string): number | null;