promises.js

function returnsPromise() {
  if (Math.random() * 100 > 50) {
    return new Promise((resolve, reject) => {
      setTimeout(() => {
        resolve("okay");
      }, 1000);
    });
  } else {
    return new Promise((resolve, reject) => {
      setTimeout(() => {
        reject("error");
      }, 1000);
    });
  }
}

async function fetchData() {
  console.log("Avant promise");
  try {
    console.log(await returnsPromise());
  } catch (err) {
    console.log("error", err);
  } finally {
    console.log("Après promise");
  }
}

fetchData();