one-schema/src/core/builtin-validators/datetime.ts

one-schema object validator

// https://www.myintervals.com/blog/2009/05/20/iso-8601-date-validation-that-doesnt-suck/
const iso8601Tester = /^([+-]?\d{4}(?!\d{2}\b))((-?)((0[1-9]|1[0-2])(\3([12]\d|0[1-9]|3[01]))?|W([0-4]\d|5[0-3])(-?[1-7])?|(00[1-9]|0[1-9]\d|[12]\d{2}|3([0-5]\d|6[1-6])))([T\s]((([01]\d|2[0-3])((:?)[0-5]\d)?|24:?00)([.,]\d+(?!:))?)?(\17[0-5]\d([.,]\d+)?)?([zZ]|([+-])([01]\d|2[0-3]):?([0-5]\d)?)?)?)?$/;

export default (input: string) => {
  if (typeof input !== 'string') {
    return false;
  }

  return iso8601Tester.test(input);
};