Qt for WebAssembly

@SyntaX You would need to preload the files at compile time. https://emscripten.org/docs/tools_reference/emcc.html#emcc-preload-file

This solution works fine for get parameter, I was wondering if this is possible for post too? Or is there another solution to this, so I don't have to show the parameter directly in the address ?

Hi @JKSH , Now it's clear enough what I have to do, then I will try to build the source code for Qt WebAssembly and generate the necessary set of libraries. I appreciate your help on this! Thanks.

@JonB I know Qtsql module not supported in Wasm. i believe wasm supports virtual file system and tried QFile read and write operation. why Qt still not support for SQL? even i need Sqlite should work on wasm. @lorn-potter can you please answer for this? thanks,

Hi @SGaist , One thing that made me skeptical about the info on the introduction page, was the affirmative that webassembly doesn't support threads, which is not an absolute true, in fact is relatively simple to enable thread support with the correct emscripten version. But everything so far is telling me that is not possible, or at least it will be very hard to compile wasm as shared.

I found out that the QtWebEngine module is indeed not available and instead QtWebView is available. After replacing WebEngineView with WebView, the compiling error is gone and the program compiles. But yes QtWebview is unsupported as it is integrated with QtWebengineView

@RogueWarrior no experience with webassembly, but by creating and running a Qt app on the embedded device, you could leverage access via any VNC client using the VNC platform plugin i.e. ./yourQtApp -platform vnc

@Amin-Ya Would you please specify what exactly you are referring to when you are saying the C++ path? I seem to be having the same problem here.

@jsulm thank you for the answer. That might work indeed, but the thing is the same application works on Windows, iOS, Mac, Android, and Linux. I'd have to change the logic just to make it work with Wasm. I could easily run non-Qt application simply by proxifying the call to main, is there a way to get that to work with Qt5 apps?

@Ahmed-Yarub-Hani-Al-Nuaimi Oh ok I see, thanks for your time !

@kirill_f Problem solved. I just installed upstream version of emscrypten instead of fastcomp. emsdk install sdk-upstream-1.39.8-64bit emsdk activate sdk-upstream-1.39.8-64bit

I am not even sure how supported QtLottie is on the desktop, but not yet supported for Qt WebAssermbly. I do know that the Qt WebAssembly platform has a few issues like this regarding QLogging and Q_DECLARE_LOGGING_CATEGORY that do not happen on desktop, as we are built statically linked.

There is file access, both locally and for the system. Since WebAssembly lives in the browsers javascript sandbox, to access file content on the system, outside of the browser, we created QFileDialog::getOpenFileContent and QFileDialog::saveFileContent https://doc.qt.io/qt-5/qfiledialog.html#getOpenFileContent Also, there should be persistent files, but it's a bit broken at the moment in all the releases.

What version of Qt and what version of Emscripten are you using?