index.js

// Function abstraction of try/catch

const fetch = () => new Promise((resolve, reject) => {
  setTimeout(() => {
    const fn = Math.floor(Math.random() * 2) % 2 ? resolve : reject;

    fn('Foo');
  }, 100);
});

const test = (trial) => ({
  orElse: async (backup) => {
    try {
      return await trial();
    } catch (error) {
      return backup(error);
    }
  },
});

async function main() {
  const foo = test(fetch);

  const ps = Array.from({ length: 20 }, () => foo.orElse((e) => `Error ${e}`));

  const res = await Promise.all(ps);

  console.log(res);
}

main();