isExists
import { isExists } from "https://esm.sh/v135/date-fns@3.6.0/index.d.mts";@example
// For the valid date:
const result = isExists(2018, 0, 31)
//=> true
@example
// For the invalid date:
const result = isExists(2018, 1, 31)
//=> false
function isExists(
year: number,
month: number,
day: number,
): boolean;