Write a function that uses recursion to return the total value of a generator

generator-recursion.js

function * gen() {
    for (let i = 0 ; i < 5; i++) yield i;
}
const myGen = gen()

const getTotal = (gen) => {
  let total = 0;
  const add = (gen) => {
    const currentGen = gen.next();
    if (!currentGen.done) {
        total += currentGen.value;
        return add(gen);
    }
    return total;
  }
  return add(gen);
};

console.log(getTotal(myGen));