Faster code navigation

I was just wondering if there has been any suggestions about making the navigation of a repo’s directory faster by giving an option (like a side triangle or arrow) to expand the sub-directories instead of loading a new page every time.

Sorry I know this sounds a bit simple but it’s something that occurred to me and I was wondering if anyone else has noticed this. It feels a bit unnecessary having to load another page for directories that have few files in them and then having to go back constantly when it could be viewed quicker and easier if it’s expanded in a list.

I sent in a suggestion and just wanted to share to see if anyone else might feel this way too.