bubblesort.js

function bubble_sort(arr){
  for(let i = 0 , n = arr.length ; i < n - 1 ; n -= 1){
    for(let ii = i , j = i + 1 ; j < n ; j += 1 , ii += 1){
      if(arr[ii] > arr[j]){
        let temp = arr[ii] 
        arr[ii] = arr[j]
        arr[j] = temp 
      }
    }
  }
  return arr
}