Hi Leonardo.

Only thing that comes in my mind is maybe you have forgotted to reference the angular.js library in your HTML. The approach mentioned in the blog posts is just the copying of files. The script doesn't do anything else. So after you have copied the scripts from node_modules you still have to reference them in correct order and they src should point to the destination folder.

I hope this will help you. If anything then let me know.

Cheers!