An example of a UI toolkit that does do this is https://jpro.one https://jpro.one which renders JavaFX apps to HTML. They use it for their whole website and eve

An example of a UI toolkit that does do this is https://jpro.one https://jpro.one which renders JavaFX apps to HTML. They use it for their whole website and even their documentation. It works fairly well except if you go offline and lose the connection to the server.