[Development] QML 3 and JavaScript

Dmitry Volosnykh dmitry.volosnykh at gmail.com
Tue Nov 12 09:41:33 CET 2019

Will the live reloading of QML engine be supported as of version 3?

On Tue, Nov 12, 2019 at 11:24 AM Ulf Hermann <ulf.hermann at qt.io> wrote:

> > If not Javascript, then what? Python? This is the first I've heard of
> > this. Just wondering what it is if not javascript?
> It will be a subset of JavaScript, with type annotations in TypeScript
> style, that does not necessitate a garbage collector and minimizes
> dynamic memory allocation. I don't know exactly, yet, which language
> constructs will be supported and which ones we will have to drop.
> I will likely take some inspiration from Qt for MCU, which has the same
> problem.
> No, it will not be python. Imagine python's white space semantics inline
> in a QML document and then tell me again you want that ;). Also, we want
> to be compatible with as much QML2 code as possible. Therefore, it at
> least has to look like JavaScript.
> best regards,
> Ulf
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