Bug 250554

Summary:	Provide public C API for accessing the state and result of a promise
Product:	WebKit	Reporter:	Kasper Isager Dalsgarð <kasperisager>
Component:	JavaScriptCore	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal	CC:	gorez.tony, mark.lam, webkit-bug-importer, ysuzuki
Priority:	P2	Keywords:	InRadar
Version:	WebKit Local Build
Hardware:	Mac (Apple Silicon)
OS:	macOS 13

Description Kasper Isager Dalsgarð 2023-01-13 02:13:03 PST

The public JavaScriptCore C API is currently missing functions for accessing the state and result of a promise. The private C++ APIs are already there:

https://github.com/WebKit/WebKit/blob/2c3591d6db31967955f974e615d986177db22774/Source/JavaScriptCore/runtime/JSPromise.h#L75-L76

It would also be great with a function for testing if a value is a promise, such as JSValueIsPromise().

Comment 1 Radar WebKit Bug Importer 2023-01-20 02:14:15 PST

<rdar://problem/104469141>

Comment 2 gorez.tony 2024-03-01 06:50:58 PST

We have the same issue here, the same concerns, be able to:

- get the result of a promise or at least have a way to attach a resolve and reject callbacks when calling `JSObjectCallAsFunction`
- have a JSValueIsPromise helper method