What Makes Async Functions Different?
Explore the key differences that set async functions apart from synchronous functions in JavaScript. Understand how async functions always return promises, handle thrown errors as promise rejections, and enable the use of await expressions and for-await-of loops for effective asynchronous programming.
We'll cover the following...
We'll cover the following...
Async functions are different from synchronous functions in four ways:
- The return value is always a promise.
- Thrown errors are promise rejections.
- The
awaitexpression can be used. - The
for-await-ofloop can be used.
These four aspects of async functions make them quite different from synchronous ones, so it’s worth going through each point in more detail.
The return value is always a promise
We can use the return operator in async functions ...