Answers for "js check invalid date"

js check if date object is invalid

const isValid = !Number.isNaN(new Date(timestamp).getTime())

js check invalid date

const validDate = !isNaN(Date.parse('foo'))

new date javascript invalid date

if (Object.prototype.toString.call(d) === "[object Date]") {
  // it is a date
  if (isNaN(d.getTime())) {  // d.valueOf() could also work
    // date is not valid
  } else {
    // date is valid
  }
} else {
  // not a date
}