Hi,
Some improvements/additions were made to the zenfs support in pas2js.
https://www.freepascal.org/~michael/pas2js-demos/zenfstree/
The ZenFS filesystem as used in the demo, uses browser local storage to store files. They are not easily viewable since they can be encoded in the local storage. The contents are also not easily retrievable since they are stored using a kind of inode system, and mapping a name to an inode is not trivial.
The demo shows how these 'virtual' files can actually be downloaded and saved to disk. It also showcases a small file-explorer-like component which can show the contents of the ZenFS filesystem.
Enjoy,
Michael.