When a webview style UI is required, I looked towards [Tauri](https://tauri.app/) as it provides a mean to create full apps using the system webview (the webview is not bundled within the app itself like electron and so many others). However it was not possible to use it with Tauri.
Very recently someone created a C binding for it though, opening the possibility to use from within Nim : <https://github.com/thewh1teagle/tauric>
