Masīva elementu summa rekursijā JavaScript

Tagad nevis izvadīsim masīva elementus konsole, bet atradīsim šo elementu summu:

javascriptfunction getSum(arr) {
  let sum = arr.shift();
  
  if (arr.length !== 0) {
    sum += getSum(arr);
  }
  
  return sum;
}

console.log(getSum([1, 2, 3]));

javascriptlet arr = [1, 2, 3, 4, 5];