javascript find date equal or earlier code example

Example: javascript check if two date are ugual

const isSameDate = (dateA, dateB) => {
  return dateA.toISOString() === dateB.toISOString();
};
const r = isSameDate(new Date(2010, 10, 20), new Date(2010, 10, 20));
console.log(r); //> true