JavaScript sort method numbers compare function

const numbers = [4, 2, 5, 1, 3];
numbers.sort(function(a, b) {
  return a - b;
});
console.log(numbers);

//Result:
// [1, 2, 3, 4, 5]

numbers.sort(function(a, b) {
  return b-a;
});
console.log(numbers);

//Result:
// [5, 4, 3, 2, 1]


numbers.sort(function(a, b) {
  return b===a;
});
console.log(numbers);

//Result:
// [4, 2, 5, 1, 3]