[nebulon]

This looks really nice and the online demo is quite slick also on Firefox.

I saw that there is either a Qt or GL backend, which made me wonder how this is used then in the online demo or is the browser backend a third, undocumented one?

Also how is input (pointer, key) supported across the already apparently supported platforms?

[tronical]

Everything is currently rendered using OpenGL ES 2.0 (WebGL 1). What's currently called a "Qt Backend" uses QStyle to produce textures of the individual controls.

We use the excellent winit crate at the moment for input handling, so that abstracts it away for us.