Ported this example to use ClojureScript with shadow-cljs.
Clone this repo and run
npm install
npx shadow-cljs watch ext
# or
npx shadow-cljs release ext
Then load the ext folder as an "Unpacked Extension" via Chrome Extensions.
Written using the "modern" :target :esm, which appears to work fine. Manifests no longer need to be modified by the build because ESM can load additional files on its own (as done with the :shared module).
Only relevant change over the JS version was adding "type": "module to the "background" in manifest.json. As well as type="module" in the popup.html.
For me the notification doesn't actually show and I'm not sure why. Might be because I blocked Chrome from showing Notifications, but I can't find any indicator about any of that. The code does load and run fine which is all I wanted to show.