Is there a npm package or a "component" you can drop in a website's source with some config that would allow you to block off anything that's not on the configu

Is there a npm package or a "component" you can drop in a website's source with some config that would allow you to block off anything that's not on the configured "allow-list"? Sounds like a "privacy badger" or "uBlock" of the web-app could be a neat thing