All version of babel translate an await
statement to a _asyncToGenerator
call, it obviously has some shortcomings:
regeneratorRuntime
library From my understanding of the syntax I think any await
should be equivalent to a Promise#then
call, so the code below:
try {
let user = await getUser();
console.log(user.name);
}
catch (error) {
console.error(error);
}
is just equivalent to:
let promise$of$getUser$ = getUser();
$promise$of$getUser$.then(
$result$ => console.log($result$),
$error$ => console.error($error$)
);
In this way it is also possible to correctly map multiple await
statements or even a mix of Promise#then
and await
statements to a Promise
chain, so I must missed some cases where pure Promise#then
is not suitable for await
statements.
You can use the other 2 plugins: async-to-generator and async-to-module-method .
There's also an experimental plugin called kneden which does try to do what you are suggesting (async to promise). It's still WIP and doesn't account for all cases and most likely will not be able to.
I think you're overlooking loops:
for (let userId of userIds) {
const user = await getUser(userId);
console.log(user);
}
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