Easily define custom error types in Node.js

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

Extend an object with the properties of additional objects. node.js/javascript util.

Adds a static `extend` method to a class, to simplify inheritance. Extends the static properties, prototype properties, and descriptors from a `Parent` constructor onto `Child` constructors.

extend an object

Recursive object extending

extend like a boss

Extend Error handling for rest api

Extend native Error to create custom errors

ESLint plugin to prevent use of extended native objects

Extend Error handling for rest api

JSS plugin that enables mixing in styles.

minimal implementation of a PassThrough stream

Use the @extend at-rule and functional selectors in CSS

Tree utilities which provides a full-featured extend and object-cloning facility, and various tools to deal with nested object structures.

Underscore's extend method as a standalone Common JS module.

Recursive object extending

A port of jQuery.extend that actually works on node.js

Error with more than just a message, stacktrace parsing.

Support for `import <defer|source>` phase syntax in Acorn