how to check if two dates are equal or greater in javascript code example

Example 1: 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

Example 2: date compare in js

var x = new Date('2013-05-23');
var y = new Date('2013-05-23');

// less than, greater than is fine:
x < y; => false
x > y; => false
x === y; => false, oops!

// anything involving '=' should use the '+' prefix
// it will then compare the dates' millisecond values
+x <= +y;  => true
+x >= +y;  => true
+x === +y; => true