[frutiger]

Not sure where you mean by synchronously but if you mean what I think you mean then that is not correct behaviour. This is important to ensure predicatibility.

Eg.

    Promise.then(() => console.log(“a”));
    console.log(“b”)

must log [“b”, “a”] and not [“a”, “b”].

[canadahonk]

This type of test does work as expected. The "sync" means that it does not feature a full event loop (yet) so cannot easily support async I/O or some more "advanced" use cases.

[spankalee]

There's a WASI async functions proposal I think? Are you looking at supporting that so you don't have to bring your own event loop?

[cowsandmilk]

JavaScript doesn’t make the guarantee you are claiming here

[jitl]

Yes, it does. Promise continuations always run in the micro task queue per the standard. I guess if someone mutates the promise prototype it’s not guaranteed, but the spec does guarantee this order

[fwip]

What do you mean? Does JavaScript allow the `then` of a promise to execute before the contents of the promise?