Reports

Always, Keep in mind that an iterator (in JavaScript) is simply any object that follows the iterator protocol: it has a .next() method that returns items in a sequence until it’s done. The tricky part is that you can’t use array methods like .map() or .forEach() directly on iterators—these methods work on arrays (or array-like structures).

How to iterate over an iterator? To iterate over an iterator more “naturally” in JavaScript, you can either:

Spread it into an array:

    const arrayFromIterator = [...myIterator];

    arrayFromIterator.map(...)
    arrayFromIterator.forEach(...)
   // Use a for...of loop:


    for (const item of myIterator) {
       console.log(item);
          }

Once you convert or iterate it in a loop, you have the resulting items in a typical JavaScript data structure (e.g., an array) that’s easily consumed by React or other libraries.

For your react code :

function MyComponent() {
  const [pokemons, setPokemons] = React.useState([]);

  React.useEffect(() => {
    fetch("/missionDay")
      .then((res) => res.json())
      .then((data) => {
        // data.message is presumably an array of IDs
        // Convert them to the actual Pokemon array
        const fetchedPokemons = data.message.map((id) =>
          Pokemon.find((pok) => pok.id === id)
        );
        setPokemons(fetchedPokemons); // store as array
      })
      .catch((err) => console.error(err));
  }, []);

  // Then render it easily in the JSX:
  return (
    <ul>
      {pokemons.map((pokemon) => (
        <li key={pokemon.id}>{pokemon.name}</li>
      ))}
    </ul>
  );
}

Upvote if helpful.

79311234