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History

Pascal Thomet ed7d965818 Examples: GLFW+OpenGL3, GLFW+WGPU: Emscripten Makefiles uses port contrib.glfw3 (#8742 ) This unofficial port offers a better support for HighDPI. See - https://emscripten.org/docs/compiling/Contrib-Ports.html - https://github.com/pongasoft/emscripten-glfw		4 months ago
..
web	Examples: GLFW+WebGPU: Rename example_emscripten_wgpu/ to example_glfw_wgpu/ (#7435 , #7132 )	2 years ago
CMakeLists.txt	Backends: WGPU: add IMGUI_IMPL_WEBGPU_BACKEND_DAWN/IMGUI_IMPL_WEBGPU_BACKEND_WGPU to support more targets. (#7977 , #7969 , #6602 , #6188 , #7523 )	1 year ago
Makefile.emscripten	Examples: GLFW+OpenGL3, GLFW+WGPU: Emscripten Makefiles uses port contrib.glfw3 (#8742 )	4 months ago
README.md	Examples: GLFW+WebGPU: Rename example_emscripten_wgpu/ to example_glfw_wgpu/ (#7435 , #7132 )	2 years ago
main.cpp	Examples: remove explicit font sizes from AddFontXXX() calls. Add commented out style.FontSizeBase assignment.	5 months ago

How to Build

You need to install Emscripten from https://emscripten.org/docs/getting_started/downloads.html, and have the environment variables set, as described in https://emscripten.org/docs/getting_started/downloads.html#installation-instructions
Depending on your configuration, in Windows you may need to run emsdk/emsdk_env.bat in your console to access the Emscripten command-line tools.
You may also refer to our Continuous Integration setup for Emscripten setup.
Then build using make -f Makefile.emscripten while in the example_glfw_wgpu/ directory.
Requires recent Emscripten as WGPU is still a work-in-progress API.

To run on a local machine:

Make sure your browse supports WGPU and it is enabled. WGPU is still WIP not enabled by default in most browser.
make serve will use Python3 to spawn a local webserver, you can then browse http://localhost:8000 to access your build.
Otherwise, generally you will need a local webserver:
- Quoting https://emscripten.org/docs/getting_started:
  "Unfortunately several browsers (including Chrome, Safari, and Internet Explorer) do not support file:// XHR requests, and can’t load extra files needed by the HTML (like a .wasm file, or packaged file data as mentioned lower down). For these browsers you’ll need to serve the files using a local webserver and then open http://localhost:8000/hello.html."
- Emscripten SDK has a handy emrun command: emrun web/example_glfw_wgpu.html --browser firefox which will spawn a temporary local webserver (in Firefox). See https://emscripten.org/docs/compiling/Running-html-files-with-emrun.html for details.
- You may use Python 3 builtin webserver: python -m http.server -d web (this is what make serve uses).
- You may use Python 2 builtin webserver: cd web && python -m SimpleHTTPServer.
- If you are accessing the files over a network, certain browsers, such as Firefox, will restrict Gamepad API access to secure contexts only (e.g. https only).