Unhandled edge case for isValid() function. about moment

[antarilos]

The point is that moment(undefined) is the same as moment(), so in both statements a Moment object with the current time and date is returned.

I would suggest, assuming your date string is stored in myStringDate variable, to use:

if (myStringDate && moment(myStringDate).isValid()) {
  // Do whatever is needed when the date is valid
}

Just in case you would prefer an early return pattern:

if (!myStringDate || !moment(myStringDate).isValid()) {
  return;
}
// Do whatever is needed when the date is valid