javascript sort array strings alphabetically

1users.sort((a, b) => a.firstname.localeCompare(b.firstname))

1//sort array alphabetically
2objArray.sort(function(a, b) {
3   return a.localeCompare(b);
4});

1var items = ['réservé', 'premier', 'communiqué', 'café', 'adieu', 'éclair'];
2items.sort((a, b) =>
3   a.localeCompare(b)//using String.prototype.localCompare()
4);