function bubbleSort(arr) {
arr.map(el1 => arr.map((el2, i) => {
if (arr[i] > arr[i + 1]) {
[arr[i], arr[i + 1]] = [arr[i + 1], arr[i]];
}
}))
return arr;
}
const arr = [4, 8, 2, 11, 9, 7, 3, 1];
bubbleSort(arr);
console.log(arr);
/*
run:
[1, 2, 3, 4, 7, 8, 9, 11]
*/