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

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

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

ES2015 `Object.assign()` ponyfill

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

Error comparison and information related utility for node and the browser

Deep diffs two objects, including nested structures of arrays and objects, and return the difference.

Recursive object extending

Check if a binary is working

Copy static properties, prototype properties, and descriptors from one object to another.

Check if a value is a plain object

Call a specified method on each value in the given object.

Check if a stream has ended

Port of jQuery.extend for node.js and the browser

Create an object path from a list or array of strings.

Lowercase the keys of an object

Caseless object set/get/has, very useful when working with HTTP headers.

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

extend like a boss

Strongly-typed deep and recursive object merging. Considers all nested levels of objects, arrays, sets and maps.