node-form-validator/lib/validators/time.js

validator for objects, json, forms

module.exports = function (data) {
  return /^(([0-9]||[0-1][0-9]||2[0-3]):([0-5][0-9])(:[0-5][0-9]){0,1}||24:00(:00){0,1})$/.test(data);
};