How to handle bad formatted date manually entered into input?

[duyn-stanford]

I can't figure out how to handle badly formatted dates that are manually typed into the date input. For example, let's say I define the formatter as:

const formatter = ref({
  date: 'YYYY-MM-DD',
});

And then I manually enter '9/16/24` as input (for a single date date-picker) and leave focus of the input, I can't get at the inputted value. I'd like to at least reset it to an empty value on a blur event. Anyone have a workaround?