• Added support for symlinks
• Removed callback support in configure and initialize
• Added support for Backend in configure
• Greatly simplified FileSystem
  • Removed methods from Internal API: access, open, truncate, readFile, writeFile, appendFile, chmod, chown, utimes, symlink, readlink, 'realpath'
  • Combined BaseFileSystem into FileSystem (removed default ENOTSUP implementations and marked them as abstract)
  • Changed from an interface to an abstract class
  • Renamed FileSystem.whenReady to FileSystem.ready
  • Added AsyncFileSystem (adds default ENOTSUP implementations for synch methods)
  • Removed metadata.supportsLinks
• Changes to SyncStore and AsyncStore and their FSes
  • Added support for hard links
  • Updated SimpleSyncRWTransaction to use Map and Set instead of normal objects and arrays
  • Removed "KeyValue" from Sync* and Async* names
  • Renamed del to remove on transaction classes
• Reworked backends
  • Renamed BackendContructor to Backend
  • Separated backends from FS classes
  • Changed to using createBackend(backend) instead of binding createBackend to the backend
  • Added isBackend and isBackendConfig
  • Renamed getFileSystem to resolveBackendConfig
  • Removed callback support createBackend
• Changes to the emulation layer
  • Fixed the options for many functions
  • Added FileHandle
  • Fixed fs.promises functions that use a FileHandle instead of numeric descriptor
  • Removed some fs.promises functions that do not exist on the Node API
  • Added type checks with the Node API using satisfies on each method instead of a single intersection type assignment
  • Added writeFileSync data check
• Reworked LRUCache
• Fully and correctly implemented encode and decode
• Improved File
  • Changed from an interface to an abstract class
  • Combined BaseFile into File (removed default ENOTSUP implementations and marked them as abstract)
  • Added File.path
  • Changed File.get* methods to getters
  • Fixed File.readSync's behavior when reading past the end of the file
• Added setters to Stats.*time
• Improved Inode
  • Changed the data members to be accessors that modify the underlying buffer directly
  • Removed serialize and Deserialize
  • Changed Inode.update to accept Readonly<Stats>
  • Added data getter which returns the buffer
  • Changed Inode to named instead of default export
• Changes to ApiError
  • Renamed ApiError.FileError to ApiError.OnPath
  • Removed ApiError.Deserialize and ApiError.serialize
• Tests
  • Restructured tests directory
  • Changed tests to not use multiple backends since they would not work at all with the multi-backend setup.
  • Fixed many of the tests
  • Added tests for encoding