Qt for WebAssembly

Maybe you need to add #include <emscripten.h> Yes, that script is for QSettings, but you could put /src in there as well.

@sitesv said in QApplication::processEvents() doesn't works: Trying to do next: C:\Qt\6.3.0>\Src\configure.bat -qt-host-path C:\Qt\6.3.0\wasm_32 -no-warnings-are-errors -platform wasm-emscripten -device-option QT_EMSCRIPTEN_ASYNCIFY=1 -prefix C:\Qt\6.3.0\wasm_32_asyncify But there is an error message: CMake Error at qtbase/cmake/QtToolHelpers,cmake:156 (message): The tool "Qt6::moc" was not found in the Qt6CoreTools package. This Q was solved. There is an error in qt host parameter... But problem with QEventLoop still exist...

Hello, Thank you, I found out the issue. The problem was with emscripten version. The qt6 requires 2.0.14, but i have installed latest version 3.x.x now i have installed the correct version and it works fine. Thank you. Bhimesh G K

I am using 5.15.2

@just_a_developer said in Webassembly - Typescript support: Would it be possible to have Typescript output with *.ts extension? May I ask why you want this? A *.js file can be integrated into TypeScript code A *.ts files cannot be used directly with HTML websites; they need to be compiled into *.js files first

If you need to access/ show your app via a web browser then WebEngine won't help you at all. You can use WebAssembly or any different web framework (Cutelyst, Django, RoR etc.)

I had the same problem and the problem was the Qt host build haven't qtshadertools module. I recompiled qtshadertools module in Qt host build and solved it

Problem solved. I don't know why, but qt needs to be configured to work with emsdk. Tools->Options->Devices->WebAssembly ...and add root directory.

Short explanation is that the webassembly qpa plugin has no support for the input context. :)

https://bugreports.qt.io/browse/QTBUG-84392 With Qt 6.2, you can use qt-cmake to build examples, which does not have this issue.

This is already fixed in 6.2.3, and 6.3

windows.h is not part of the emscripten sdk, as it does not have the Javascript port of the windows API. You could port those parts to Qt or SDL.

Without having the faintest of clues about the actual problem, at a glance it looks to me like some missing/incomplete/bogus library support issue. I suggest you bring this to the mailing list, we don't get much traffic for wasm here.

@lorn-potter Yes I want to do something like put a texture on the cube surface in WebAssembly. Could I ask what Qt components should I use? Currently I tried QQuickFramebufferObject and QQuickItem (following the "Scene Graph - OpenGL Under QML" example), but haven't get a successful texture rendering in Chrome browser on Ubuntu 20.04 (Qt version 5.15.2). I also tried without WebAssembly using QOpenGLWidget, in this way the texture works normal.

Thanks Lorn, I will give that a try. Gary