react-keyboard-time-input/es/lib/validate.js

A keyboard friendly react component for capturing time

// validate
export default (function (val) {
  return (/^[0-2][0-9]:[0-5][0-9](:[0-5][0-9](:[0-9][0-9][0-9])?)?(\s+[ap]m)?$/i.test(val)
  );
});