Topics
5 topicsFile Descriptors & Handles
How file descriptors and FileHandle objects map to OS file state, open flags, close behavior, libuv work, and EMFILE failures.
File I/O
How Node.js reads and writes files through whole-file helpers, streams, low-level read/write calls, append mode, and durable flushes.
fs.promises & FileHandle
How fs.promises and FileHandle work in Node.js, including async file operations, descriptor ownership, stream lifecycles, cleanup, and controlled concurrency.
fs.watch & Atomic Writes
How fs.watch, fs.watchFile, OS watcher backends, and atomic replacement patterns interact in real file workflows.
Permissions & Metadata
How Node.js exposes file permissions, ownership, stat metadata, symlinks, inodes, sparse files, special paths, and filesystem edge cases.