[Interest] Could I use V8 engine directly in QT?

Max Paperno max-l at wdg.us
Thu Dec 8 18:25:03 CET 2022

Hi Bob,

What is this v8 you're referring to (in terms of QJSEngine I mean)? Can 
you explain "it used" further?

It's possible, in many/most cases, to extend or even replace the 
built-in JS types in QJSEngine (not QQmlEngine). Either with pure JS 
implementations or C++ or a mix. I'm not sure about adding language 
syntax constructs like async/await though (but you can already use 
Promises, for example).


On 12/7/2022 3:59 AM, z.hang.1992 wrote:
> Hi,
> Currently, I'm using QT 6.4.1, and I use QJSEngine to run JavaScript, 
> but I found it does not support the latest EMACScript standards, e.g, 
> async/await and string.prototype.replaceAll(). But the v8(10.2.154) it 
> used supports these. Seems QV4 implements the ECMAC by itself.
> So, Is there any way to use v8 directly in QT?
> It would be good to have some suggestions from you, maybe my 
> understanding about QJSEngine is totally wrong.
> Thanks, and have a nice day!
> Bob
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