Add imgui_impl_emscripten.cpp?

[ItIsApachee]

Version/Branch of Dear ImGui:

master

Back-ends:

Custom backend

Compiler, OS:

Emscripten

Full config/build information:

No response

Details:

My Issue/Question:

Currently there is no backend to use with Emscripten without relying on some thirdparty library like GLFW. I think creating separate backend to use with Emscripten might be beneficial. This would allow for easier setup without emulating native environment.

Considering support for Emscripten is already there, this might not be that difficult to do, but I can't say for sure.

I need this for my small project I write with Emscripten, but if this gains popularity and is not completed in several months time, I might bring pull request with required changes. That is, of course, if these changes are welcome.

Screenshots/Video:

No response

Minimal, Complete and Verifiable Example code:

No response

[ocornut]

#8178