const array1 = [1, 0, 2, 3, 4];
const array2 = [3, 5, 6, 7, 8, 13];

const getMaxLengthFromArrays = (firstArray, secondArray) => Math.max(firstArray.length, secondArray.length);
const isNumber = value => isNaN(value) ? 0 : value;

const getSumFromTwoArrays = (firstArray, secondArray) => {
  const arrayFromTotalLength = Array.from({ length: getMaxLengthFromArrays(firstArray, secondArray) });
  return arrayFromTotalLength.reduce((acc, _, idx) => {
    return [...acc, isNumber(firstArray[idx]) + isNumber(secondArray[idx])]
  }, []);
}

console.log(computeSumFromTwoArrays(array1, array2));