Bad news. I've had a javascript library named Rome that I created over a year ago, https://github.com/Akkuma/Rome/commit/0cdcd210351d5c546064be...
People who use npm packages in browser code are pretty much all using Browserify or Webpack and leverage npm. (Many people use Bower, but I don't see the point of using two overlapping package managers.)
It's a new dawn of modular JS code; no more global namespace, no more stuffing CDN links in your <head>. I recommend giving it a go.