Purpose and how to use?

[ShafSpecs]

How to use?

What is the use and purpose of fs-web and when do you want to use it? I am asking this cause I am a bit confused. Do you use it with actual files? Or is it to create an abstract file system in the browser like CodeSandbox? If for example, I want to create a file system like this on the browser, where every file is an object, is fs-web built for that:

app/
├── routes/
│   ├── about.tsx
│   └── index.tsx
└── root.tsx

Or is it simply used for interacting with actual files in the browser?