JSFiddle - React, Tailwind, and code Playground

JavaScript

function sort(arr) {
  arr.sort(function(x, y) {
    if (x < y) {
      return -1;
    } else if (x > y) {
      return 1;
    } else {
      return 0;
    }
  })
  
  alert(arr);
}

sort([1, 23, 3, 4, 123, 9])