js bubbleSort

function bubbleSort(arr)  {
  if (arr.length <= 0) { return arr; }
  for (var i = 0, len = arr.length - 1; i < len; i++) {
    for (var j = 0; j < len - 1- i; j++) {
      if (arr[j] > arr[j + 1]) {
        var temp = arr[j + 1];
        arr[j + 1] = arr[j];
        arr[j] = temp;
      }
    }
  }
  return arr;
}

var arr = [1,34 ,3 , 5, 77, 2, 89];
console.log(bubbleSort(arr)); // [ 1, 2, 3, 5, 34, 77, 89 ]