https://zi.is/
Both not minifying and including unenforced type hints consumes a little bandwidth though this can be largely offset by compression. This is an engineering trade off against the complexity of getting source maps working reliably for debugging and alerting. If I am shipping a video player or an internal company dashboard how much of my time is that bandwidth worth?
This project is an enhanced reader for Ycombinator Hacker News: https://news.ycombinator.com/.
The interface also allow to comment, post and interact with the original HN platform. Credentials are stored locally and are never sent to any server, you can check the source code here: https://github.com/GabrielePicco/hacker-news-rich.
For suggestions and features requests you can write me here: gabrielepicco.github.io