path-type
Check if a path is a file, directory, or symlink
file-type
Detect the file type of a file, stream, or data
is-stream
Check if something is a Node.js stream
is-typed-array
Is this value a JS Typed Array? This module works cross-realm/iframe, does not depend on `instanceof` or mutable properties, and despite ES6 Symbol.toStringTag.
kind-of
Get the native type of a value.