Mastering Asynchronous JavaScript: From Callbacks to Async/Await

Earlier today, RisingStack published an article on asynchronous programming practices, discussing how to use asynchronous tools to solve callback problems and avoid callback hell.

The article covers several asynchronous handling methods, including async.js, promises, generators, and async functions.

For illustration, a typical callback‑based function is shown:

function handler (done) {
  validateParams((err) => {
    if (err) return done(err);
    dbQuery((err, dbResults) => {
      if (err) return done(err);
      serviceCall((err, serviceResults) => {
        done(err, {
          dbResults,
          serviceResults
        });
      })
    })
  })
}

When rewritten with Promise and await, the same logic becomes much cleaner:

async function handler () {
  await validateParams();
  const dbResults = await dbQuery();
  const serviceResults = await serviceCall();
  return { dbResults, serviceResults };
}

The article also lists other asynchronous patterns besides await, encouraging readers to try them and see which they are comfortable with.

Take a few minutes to read the original article and boost your asynchronous programming skills.