4 ms·

I don't know if they've changed their approach over the past year, but the last time I looked at Qt demos for the web, I was solidly unimpressed. At the time,

I don't know if they've changed their approach over the past year, but the last time I looked at Qt demos for the web, I was solidly unimpressed. At the time, they were making almost all of the same mistakes that Flutter is, and the devs I talked to seemed to be of the opinion that those problems wouldn't be fixed until browsers started adding brand new capabilities specifically for them. Looking now at the demos at https://www.qt.io/qt-examples-for-webassembly https://www.qt.io/qt-examples-for-webassembly, a lot of the same problems are jumping out at me. A complete lack of accessibility features, poor handling of scroll events, large load times, unfocusable fields, lack of keyboard controls, etc... Halfway through playing with their pizza app, the page just froze and stopped responding to any clicks at all. Maybe those demos are outdated? Blazor and Rust are showing a lot of promise here, but from what I know about Qt I'm much less optimistic, because Qt is used to handling everything about rendering itself -- and as Flutter is showing that's just not a good approach to building web GUI frameworks. But (again, purely from what I've seen) trying to layer on a system where Qt is actually interacting with the DOM seems like it would require a somewhat difficult shift in its architecture. Maybe I'm misunderstanding the problem though.

gagege 6y ago
Whoa, yeah, none of those Qt demos are good or even seem to work properly. Yikes.
0xFluegel 6y ago
> Looking now at the demos at https://www.qt.io/qt-examples-for-webassembly https://www.qt.io/qt-examples-for-webassembly, a lot of the same problems are jumping out at me. A complete lack of accessibility features, poor handling of scroll events, large load times, unfocusable fields, lack of keyboard controls, etc... I found that hard to believe. But, clicking that link and trying the pizza demo... Yikes. It's not exaggerated at all.
- hnedeotes 6y ago
  Qt for WebAssembly: Pizza Shop Application exit (TypeError: undefined is not an object (evaluating 'handle[name]'))
  - sombersonder 6y ago
    May I ask what browser and version you ran this in? It does look dated but ran okay for me on Firefox 86 and Chrome 89.
    - hnedeotes 6y ago
      Yeap, Safari 14.0.3
- barbarbar 6y ago
  When I try that link I get: RangeError: WebAssembly.Memory(): could not allocate memory So no pizza demo for me.
ognarb 6y ago
For the moment the only useful usecase of qt for webassembly I found is: https://qmlonline.kde.org/ https://qmlonline.kde.org/ It's really useful to share some bits of QML but otherwise I wouldn't recommend using Qt for the web as much as I wouldn't recommend to use Flutter for the web.
sgerenser 6y ago
At least you got the pizza demo to work at all. All I got was a large Qt logo with the message: Application exit (TypeError: undefined is not an object (evaluating 'handle[name]'))
deleted 6y ago
[deleted]
cachvico 6y ago
These demos remind me of Flash..
eska 6y ago
The pizza demo didn't even let me input text into the credit card input boxes..

gagege 6y ago

Whoa, yeah, none of those Qt demos are good or even seem to work properly. Yikes.

0xFluegel 6y ago

> Looking now at the demos at https://www.qt.io/qt-examples-for-webassembly https://www.qt.io/qt-examples-for-webassembly, a lot of the same problems are jumping out at me. A complete lack of accessibility features, poor handling of scroll events, large load times, unfocusable fields, lack of keyboard controls, etc... I found that hard to believe. But, clicking that link and trying the pizza demo... Yikes. It's not exaggerated at all.

hnedeotes 6y ago
Qt for WebAssembly: Pizza Shop Application exit (TypeError: undefined is not an object (evaluating 'handle[name]'))
- sombersonder 6y ago
  May I ask what browser and version you ran this in? It does look dated but ran okay for me on Firefox 86 and Chrome 89.
  - hnedeotes 6y ago
    Yeap, Safari 14.0.3
barbarbar 6y ago
When I try that link I get: RangeError: WebAssembly.Memory(): could not allocate memory So no pizza demo for me.

ognarb 6y ago

For the moment the only useful usecase of qt for webassembly I found is: https://qmlonline.kde.org/ https://qmlonline.kde.org/ It's really useful to share some bits of QML but otherwise I wouldn't recommend using Qt for the web as much as I wouldn't recommend to use Flutter for the web.

sgerenser 6y ago

At least you got the pizza demo to work at all. All I got was a large Qt logo with the message: Application exit (TypeError: undefined is not an object (evaluating 'handle[name]'))

deleted 6y ago

[deleted]

cachvico 6y ago

These demos remind me of Flash..

eska 6y ago

The pizza demo didn't even let me input text into the credit card input boxes..