memfs

memfs

JavaScript file system utilities for Node.js and browser. Implementation of in-memory Node.js fs module API and in-memory browser File System API, as well as adapters from fs module to File Sytem API and from File Sytem API to fs module.

Install

npm i memfs

Resources

• In-memory Node.js fs API
• In-memory browser File System (Access) API
• fs to File System (Access) API adapter
• File System (Access) API to fs adapter
• Directory snapshot utility
• print directory tree to terminal
• Code reference
• Test coverage

Demos

• Git in browser, which writes to a real folder
• Git in browser, which writes to OPFS file system
• Git on in-memory file system
• fs in browser, creates a .tar file in real folder
• fs in browser, synchronous API, writes to real folder

See also

• unionfs - creates a union of multiple filesystem volumes
• fs-monkey - monkey-patches Node's fs module and require function
• linkfs - redirects filesystem paths
• spyfs - spies on filesystem actions

License

Apache 2.0

Similar packages

Other packages similar to memfs

mock-fs

mock-fs is a package that provides a mock file system for Node.js. It is similar to memfs in that it allows you to create an in-memory file system for testing purposes. However, mock-fs overrides the native fs module, while memfs provides a separate file system instance.

unionfs

unionfs is a package that can combine multiple file systems into a single cohesive file system interface. It can be used with memfs to overlay an in-memory file system on top of the real file system, providing a way to mix real and virtual file system operations.

fs-mock

fs-mock is another in-memory file system module for Node.js. It offers similar functionality to memfs, allowing you to mock the fs module for testing. It differs in API and implementation details, and the choice between fs-mock and memfs may come down to personal preference or specific use-case requirements.