typia/src/internal/_isFormatTime.ts

Superfast runtime validators with only one line

export const _isFormatTime = (str: string): boolean => PATTERN.test(str);

const PATTERN =
  /^([01][0-9]|2[0-3]):[0-5][0-9]:[0-5][0-9](?:\.[0-9]{1,9})?(Z|[+-]([01][0-9]|2[0-3]):[0-5][0-9])$/i;