'Rich HTML tray menu in a desktop web application

I want to create a tray menu app with custom buttons, sliders, maybe some nice transition effect, a header and footer like this:

menu

The application needs to work on Linux, Windows and Mac. I guessed it should be possible with a desktop web app + some HTML, but I can't find any useful example for any framework. Every example uses the OS' menu that just doesn't have the elements I need.

Can anyone direct me how to more or less implement this in any of the web app frameworks?



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