SOURCE

function sort(arr) {
    let temp = 0;
    let j;
    for (let i = 1; i < 7; i++) {
        temp = arr[i];
        j = i - 1;
        while (j >= 0 && temp < arr[j]) {
            arr[j + 1] = arr[j];
            j--;
        }
        arr[j + 1] = temp;
    }
    for (let i = 0; i < 7; i++) {
        console.log('[', arr[i], ']');
    }
}

const nums = [2, 4, 1, 6, 5, 3, 7];
console.log(sort(nums));