example of promise.all

Example 1: javascript promise.all

try {
    const [res1, res2, res3] = await Promise.all([
      Promise1,
      Promise2,
      Promise3,
    ]);
  } catch (err) {
    console.error(err);
  }

Example 2: javascript promise.all

// PARALLEL PROMISES
async function fetchMoviesAndCategories() {
  const [moviesResponse, categoriesResponse] = await Promise.all([
    fetch('/movies'),
    fetch('/categories')
  ]);

  const movies = await moviesResponse.json();
  const categories = await categoriesResponse.json();

  return [movies, categories];
}