Qt for WebAssembly

@sheqo EDIT: I tried it on a new project and web assembly works fine, but there is something wrong with this project, can you think of anything?

All you need to do is copy files into the webserver filesystem. I just do: scp *.wasm *.js *.html $IP You will also need to set up the webserver correctly though.

SQLite 3.40 is now available with official support for Wasm

It is indeed a bug, see: https://bugreports.qt.io/browse/QTBUG-106707

In Qt 6.4 (on macos) Debug build does not generate javascript file...

Sorry, should have been more clear about this point: I have the "same" rendering code successfully running in webassembly (https://sgsaenger.github.io/vipster/emscripten/), so it should be more or less correct. This standalone app obtains canvas and webgl2 context via the emscripten helper functions, so glGetString(GL_VERSION) reports OpenGL ES 3.0 (WebGL 2.0 (OpenGL ES 3.0 Chromium)) as expected. Note the weird mismatch in OpenGL ES 2.0 (WebGL 2.0 (OpenGL ES 3.0 Chromium)) when Qt is doing its initialization first. My guess is that somewhere there's a conflict between my setup code (or expectations) and what Qt is doing before initGL() is reached. Is there maybe any working GLES3 QOpenGLWidget examples?

@zeethree50 I found this bug https://bugreports.qt.io/browse/QTBUG-105582

@lorn-potter I try asap

I also know this is quite old, but the correct QT docs are hard to find when you approach it from the error first -> search later stance. TL;DR You need to add your emsdk path to Options >> Devices >> Webassembly tab, before trying to configure any kind of Kit for Webassembly. This here describes it with pictures to guide you along: https://doc-snapshots.qt.io/qtcreator-master/creator-setup-webassembly.html

@JoeCFD said in Warning: This file is not part of any project: INCLUDEPATH += $$PWD DEPENDPATH += $$PWD That didn't seem to work :/ I'll also note the issues that are coming up in QtCreator [image: 8a409062-1482-474c-8fd6-cdb7c57c52ae.png] My Emscripten version is 3.1.6, it just doesn't seem to recognize the version number [image: 68425b2d-2087-49d1-ad38-d47ceb1cf2d5.png] and I've tried with 3.0.0 and 1.39.7 with WebAssembly 5.15.2. This project is currently 6.3.2 but I can't get any WebAssembly to work

Qt WebAssembly uses emscripten, so technically you can call any Javascript from your C++ code using emscripten API. See https://emscripten.org/docs/porting/connecting_cpp_and_javascript/Interacting-with-code.html#interacting-with-code-call-javascript-from-native. Maybe that will help you change the query in the URL? At least the opposite - reading URL query from C++ code is possible. That I have tested. #include <emscripten/val.h> ... emscripten::val location = emscripten::val::global("location"); auto search = location["search"].as<std::string>(); For cross-platform code wrap the emscripten stuff in #ifdef Q_OS_WASM.