await #await #javascript

await.js

// parallel
await Promise.all([someCall(), anotherCall()]);

// error handle use promise
function foo() {
  return bar();
}

function bar() {
  return Promise.reject(new Error('Uh oh!'));
}

function main() {
  return foo().catch(e => {
    console.error(`Something went wrong: ${e.message}`);
  });
}

main();

// error handle use await
async function foo() {
  await bar();
}

async function bar() {
  throw new Error('Uh oh!');
}

async function main() {
  try {
    await foo();
  }
  catch(e) {
    console.error(`Something went wrong: ${e.message}`);
  }
}

main();