1arr.sort(function(a, b) {
2    return a === b ? 0 : a < b ? -1 : 1;
3  });

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

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

1
2        
3            
4        
5     let numbers = [0, 1, 2, 3, 10, 20, 30];
6numbers.sort((a, b) => a - b);
7
8console.log(numbers);

1users.sort(function(a, b){
2    if(a.firstname < b.firstname) { return -1; }
3    if(a.firstname > b.firstname) { return 1; }
4    return 0;
5})
6

1//sorts arrays of numbers
2function myFunction() {
3  points.sort(function(a, b){return a-b});
4  document.getElementById("demo").innerHTML = points;
5}