Extend Packages

Setup any element as if it was a Custom Element

Standalone version of Backbone's extend

A cross platform JavaScript library that provides a classical interface to prototypal inheritance.

lightweight inheritance and compositional object model; mostly just helpers

Class extensions

Deep extend with customizable behavior for Node.js

A different approach for extending Options against Defaults.

Extend an object with the properties of other objects, but only if they don't already exist.

Recursive object extending, with support for schemes.

Recursive Object.assign(), but won't assign read-only properties.

Library for extending JavaScript dates

Angular declarative resource utility library. Write resource methods in a declarative way

Micro library for performing shallow/deep copying of objects with support for array merging + dedup

utility to create shallow extended objects, made for use with setting default options in functions

Extendable configuration processor.

Extends a target objects with functions from the source object, keeping the context of the source object.

A Javascript helper for creating a subclass that extends from a super class.

Recursively merge objects but copy arrays

generic `__proto__` injection utility

Extends one class with methods from another.