Promise?

[martijnthe]

Hi, I just glanced over the current API draft and noticed there is no ES6 Promise API, for example napi_create_promise() etc. Is this just not done yet? Or is there another reason why it is not there?

I was hoping to find a NAPI interface for it so we can make sure we are not creating an impedance mismatch with our design of the JerryScript C Promise API (feedback appreciated ;)).

[gabrielschulhof]

@martijnthe there are some conceptual differences between N-API design and JerryScript API design:

• in N-API we pass the context as an explicit parameter to each API rather than having it implicit inside the implementation
• All N-API APIs return a status to indicate whether the call was successful or not.
• JS exceptions are implemented as a check-last-error concept, rather than an error flag on a JS value
• JerryScript does not use scopes, but rather expects each value to be released explicitly

I have started to implement N-API using JerryScript in Zephyr.js (still a very early draft), and so far I have not found any problems bridging the two APIs.

You're right though, we should tackle ES promises in N-API.