We want to allow zero data charge (zero rating) on the Universal Login page. Currently, this works for our Custom Domain pages/scripts stored in our local domain. Unfortunately, other scripts that reside outside our domain cannot be loaded. i.e intTellInput.css, auth0.min.js, etc.
We use a classic login widget but download the Auth0.js from our CDN and some other files from an external CDN.
To have all the CSS and JS files hosted from their origin, you need to use the classic login page and move those files under their domain via their CDN.