BubbleSort in JS

bubbleSort.js

function bubbleSort (arr) {
  var l = arr.length,
      tmp = null,
      j = l - 1,
      i;

  if(l < 2) return arr;

  for(; j >= 0; j--) {
    for(i = 0; i < j; i++) {
      if(arr[i] > arr[i+1]) {
        // swap
        tmp = arr[i];
        arr[i] = arr[i+1];
        arr[i+1] = tmp;
      }
    }
  }

  return arr;
}

console.log(bubbleSort([9,3,1,6,65,32,2,1,1,4,9]));