# Synchronous `fs` in browser

This demo executes tests of **synchronous** Node.js API built on top of File
System Access API in browser.

There are two tests:

- OPFS — virtual file system built into browsers.
- Native File System Access API folder — a real folder that user explicitly grants permission to.

See the assertions run in the browser console.

https://github.com/streamich/memfs/assets/9773803/f841b6cc-728d-4341-b426-3daa6b43f8ac

Run:

```
demo:fsa-to-node-sync-tests
```