Support for native async/await?

[elierotenberg]

Hello,

As said in a previous issue, I'm currently working on a zone.js wrapper for Node designed to provide isolation for HTTP request handlers.

I'm working in Node 7.8, which supports native async/await.
Unless I'm doing something wrong, zone.js doesn't seem to interop nicely with native async functions.

The following piece of code:

const zone = Zone.current.fork({
  name: 'test-zone',
});
zone.run(async () => {
  console.log(Zone.current.name);
  await Promise.resolve();
  console.log(Zone.current.name);
  done();
});

yields:

test-zone
<root>

when using native async/await.
If I transpile the same code using babel-transform-async-to-generator, this yields:

test-zone
test-zone

the latter being the wanted behavior.

Am I doing something wrong? Is native async/await supported by zone.js, and if not, are there plans to support it? (Is it even possible?)

Thanks,

[elierotenberg]

After further testing, even when transpiled with babel, the example doesn't work as expected, since after the zone await-s, the Zone appears to have no pending microTask or macroTask (as per hasTaskState).

Any idea how to circumvent this limitation?

[JiaLiPassion]

@elierotenberg , this is a issue, the native async/await behavior break Zone.invoke, I will try to figure out why, thank you for posting the issue.

[Eugeny]

Thanks. This basically breaks Angular with the Typescript's ES2017 target

[JiaLiPassion]

@Eugeny , yes, I have post another issue #740, and I will post my research result there.

[mhevery]

Duplicate of #740. The short of it is that ES2017 target is not supported yet.