Qt for WebAssembly

@mirro
I have not used WebAssembly. The following is my understanding.

You can only access the webassembly page via the JavaScript DOM. Qt QWebChannel lets you do that.

I ask again, and will not repeat further:

What are you actually trying to achieve with "How to pass parameters between webassembly for qt and htm5?"?

Maybe you do not want a full webassembly application but instead just a QWebEnginePage, I don't know.

For one, you need to use the correct emscripten version for Qt version, as detailed in:
https://doc.qt.io/qt-5/wasm.html#install-emscripten
or
https://doc.qt.io/qt-6/wasm.html#installing-emscripten

@JonB

Hi~,How does the qmake command set the path to D:\emsdk\em++?

Here is the same code compiled with Qt 6.4.3 and emsdk 3.1.14:

http://bombmining.surge.sh/

This runs on Safari and iOS fine - and from the looks of it there have been a number of changes in the HTML, and perhaps elsewhere too between this version Qt 6.4.3 emsdk 3.1.14 and the Qt 6.5 emsdk 3.1.25 version that isn't running on iOS and Safari

Any help would be greatly appreciated, Thanks!

To be safe, Emscripten 3.1.25 will work, but you could also use latest, but know that one has not been extensively tested with Qt.

@lorn-potter android

@Espoo I modified my websocket code using the sample from Qt and upgraded to 6.4.2. MQTT works fine now in WASM.

@lorn-potter I'm using 6.4.2

@lorn-potter thank yoy

https://qmlonline.kde.org/

https://qt-webassembly.io/designviewer/

an example of the Slate desktop app ported to WebAssembly:
https://www.qt.io/web-assembly-example-slate

@jsulm ok... i'll have a try.

You need to install ninja and use that to build.
MSVC compiler and Emscripten don't mix well.

Thank you very much for taking the time to reply.
Gary

Indeed it does. This is a bug, I will report it for you.
https://bugreports.qt.io/browse/QTBUG-110941