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Build Status dependency status dev dependency status

extend() for Node.js Version Badge

node-extend is a port of the classic extend() method from jQuery. It behaves as you expect. It is simple, tried and true.


This package is available on npm as: extend

sh npm install extend


Syntax: extend ( [deep], target, object1, [objectN] )

Extend one object with one or more others, returning the modified object.

Keep in mind that the target object will be modified, and will be returned from extend().

If a boolean true is specified as the first argument, extend performs a deep copy, recursively copying any objects it finds. Otherwise, the copy will share structure with the original object(s). Undefined properties are not copied. However, properties inherited from the object’s prototype will be copied over. Warning: passing false as the first argument is not supported.



node-extend is licensed under the MIT License.


All credit to the jQuery authors for perfecting this amazing utility.

Ported to Node.js by Stefan Thomas with contributions by Jonathan Buchanan and Jordan Harband.