[Vuejs]-Creating Vue instance comments out everything

The problem was Content Security Policy (CSP). Since I was using a local copy of vue.min.js, I couldn’t see any of the error messages. It looked like everything was initializing as expected except it wasn’t. Once I replaced this with a un-minified version, I saw an error on the lines of:

I simply had to go update the CSP in manifest.json which I was able to do by adding:

"content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'",