SOURCE

function sort(arr) {
    for (let i = 0; i < arr.length; i++) {
        for (let j = 0; j < arr.length - 1 - i; j++){
            if(arr[j] > arr[j+1]) {
                [arr[j+1], arr[j]] = [arr[j], arr[j+1]];
            }
        }
    }
    return arr;
}
console.log(sort([2,3,1,8,7,6]))