Maybe... Rather than adding your AngularJs gear directly to the Umbraco app, you could create your own AngularJs module and inject that into the Umbraco app. Then, in the config block of your new module, could load the Vite script. I think the config stuff runs early enough so that your code is loaded before Angular does it's thing. Not sure though how the Vite script will be executed when adding it dynamically (does it load and run as soon as the element is added, or after the current script completes) I'll find an example of the app module stuff, might be useful