Plain object constructor with enhanced properties

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

Copy a descriptor from object A to object B

Check if a value is a plain object

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

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

Easily handle defaults for your options

Check if a value is an object

Test if a value is a plain object.

TypeScript abstract class enabling instance initialization from a plain object

**Note:** More details on user side API can be found in [Jest documentation](https://jestjs.io/docs/mock-function-api).

Serialize/deserialize an error into a plain object

A thing that is a lot like ES6 `Map`, but without iterators, for use in environments where `for..of` syntax and `Map` are not available.

A blazing fast deep object copier

Error comparison and information related utility for node and the browser

Convert object keys to camel case

Merge objects & other types recursively. A simple & small integration.

Fork of the class-transformer package. Proper decorator-based transformation / serialization / deserialization of plain javascript objects to class constructors

An object schema merger/validator

HTTP content negotiation