kind-of
Get the native type of a value.
Get the native type of a value.
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
Media Type Database
Returns true if the value is an object and not an array or null.
Detect the file type of a file, stream, or data
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.
Check if something is a Node.js stream
Returns true if any values exist, false if empty. Works for booleans, functions, numbers, strings, nulls, objects and arrays.
Returns true if a value exists, false if empty. Works with deeply nested values using object paths.
Determines if an object can be used as an array
Determine if an object is a Buffer
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.
Determine if an object is a Stream
Check if a value is an object
Check if a value is a plain object
Runtime validation and processing of JavaScript types