Honestly I'd suggest they just use Qt then. Our company is writing a portable replacement to our Electron client right now. The electron option was absolute garbage, very limited, and caused us untold pain. We got tired of telling customers "we can't really do that". The Qt version is already working on Linux and Windows, and on whatever CPUs we compile it for. There's no excuse for Electron, because there are good, portable GUI frameworks and libraries to use instead. Hell, don't like Qt? Use GTK+! I use GTK+ for my own portable personal projects, I like the API better and it integrates better with XFCE.