Best way to import external CSS/JS into ember


I use bootstrap in my ember application. I know there are few ways to import it to my app described here. I have 2 questions :

  1. What is the recommended way ?
  2. I know packages from node_modules/ cannot be imported (but bower packages can). Is it still relevant ? Bower is considered as deprecated and I would like to have an uniqe file (package.json) for my dependencies

Thanks a lot

There is no recommended way I think. We use our NPM ember-cli-bootstrap-css and ember-cli-bootstrap-fonts.