Bug? freeCodeCamp site is off?

In this problem, I couldn’t work out how to solve them until I come to the solution section. I then copied and pasted the solution provided but the output doesn’t change.

Site
/javascript-algorithms-and-data-structures/functional-programming/sort-an-array-alphabetically-using-the-sort-method/

function alphabeticalOrder(arr) {
  return arr.sort(function(a,b) {
    return a > b;
  });
}

Thank you for answering so quickly. Can you explain how different environment are different for something seemingly so basic?