Does "return await" makes any difference?

user_9119186 0
Viewed 654

Is there any difference between

const foo = async () => {
  // some other code that uses await
  return await bar()
}

and

const foo = async () => {
  // some other code that uses await
  return bar()
}

Where bar is a function that returns a promise.

Is the await redundant or does it make any difference?

es6-promise async-await javascript
3 Answers

It is redundant.

It extracts the value from the promise returned by bar, and then resolves the promise returned by foo with it.

If you return bar's promise directly, then the promise returned by foo adopts it to the same effect.

Dorward_190680

If the Promise is rejected, the error would be thrown in different places, in the two example you wrote.

In the first, a rejected error would happen inside foo.

In the second, a rejected error would happen to the function that called foo

user_120568410

Yes.

If the function bar() returns a Promise, in the second case foo will return a pending Promise (a Promise that has not yet resolved). In the first case, foo will return the data the Promise resolved with after waiting for the Promise to resolve

user_181717520
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