Sentry Answers>JavaScript>

Return a value from an asynchronous function call

Return a value from an asynchronous function call

David Y.

The ProblemJump To Solution

How to access a return value from an asynchronous function call in JavaScript?

The Solution

In modern JavaScript, we can use await when calling asynchronous functions to pause the execution of the current function until a value is returned. This allows us to write and reason about asynchronous code as if it were synchronous.

The code below provides an example:

Click to Copy
async function asyncHelloWorld() { return "Hello world!"; } async function asyncCaller() { const result = await asyncHelloWorld(); console.log(result); // will print "Hello world!" } asyncCaller();

Note that await can only be called from within asynchronous functions or top-level code inside a module.

  • ResourcesImprove Web Browser Performance - Find the JavaScript code causing slowdowns
  • ResourcesJavaScript Frontend Error Monitoring 101
  • Syntax.fm logo
    Listen to the Syntax Podcast

    Tasty treats for web developers brought to you by Sentry. Get tips and tricks from Wes Bos and Scott Tolinski.

    SEE EPISODES

Loved by over 4 million developers and more than 90,000 organizations worldwide, Sentry provides code-level observability to many of the world’s best-known companies like Disney, Peloton, Cloudflare, Eventbrite, Slack, Supercell, and Rockstar Games. Each month we process billions of exceptions from the most popular products on the internet.

© 2024 • Sentry is a registered Trademark
of Functional Software, Inc.