Check Packages

Get the native type of a value.

Check if argv has a specific flag

Check if the character represented by a given Unicode code point is fullwidth

Returns true if a number or string value is a finite number. Useful for regex matches, parsing, user input, etc.

Check if a path is a file, directory, or symlink

Returns `true` if the given string looks like a glob pattern or an extglob pattern. This makes it easy to create code that only uses external modules like node-glob when necessary, resulting in much faster code execution and initialization time, and a bet

Returns true if the value is an object and not an array or null.

Detect the file type of a Buffer/Uint8Array/ArrayBuffer

Returns true if a value has the characteristics of a valid JavaScript accessor descriptor.

Returns true if a value has the characteristics of a valid JavaScript data descriptor.

Returns true if a value has the characteristics of a valid JavaScript descriptor. Works for data descriptors and accessor descriptors.

Returns true if a value is a plain object, array or function.

Check if something is a Node.js stream

Returns true if a value exists, false if empty. Works with deeply nested values using object paths.

Check if a file path is a binary file

Check if the process is running inside Windows Subsystem for Linux (Bash on Windows)

Returns true if a string has an extglob.

Returns true if an object was created by the `Object` constructor, or Object.create(null).

type-check allows you to check the types of JavaScript values at runtime with a Haskell like type syntax.

Node.js 0.12 path.isAbsolute() ponyfill