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Creates a shallow clone of any JavaScript value.

Please consider following this project's author, Jon Schlinkert, and consider starring the project to show your ❤️ and support.


Install with npm:

$ npm install --save shallow-clone


const clone = require('shallow-clone');


  • array buffers
  • arrays
  • buffers
  • dates
  • errors
  • float32 arrays
  • float64 arrays
  • int16 arrays
  • int32 arrays
  • int8 arrays
  • maps
  • objects
  • primitives
  • regular expressions
  • sets
  • symbols
  • uint16 arrays
  • uint32 arrays
  • uint8 arrays
  • uint8clamped arrays


By default, only the array itself is cloned (shallow), use clone-deep if you also need the elements in the array to be cloned.

const arr = [{ a: 0 }, { b: 1 }];
const foo = clone(arr);
// foo =>  [{ 'a': 0 }, { 'b': 1 }]

// array is cloned
assert(actual === expected); // false

// array elements are not
assert.deepEqual(actual[0], expected[0]); // true


Only the object is shallow cloned, use clone-deep if you also need the values in the object to be cloned.

console.log(clone({ a: 1, b: 2, c: 3 }));
//=> {a: 1, b: 2, c: 3 }


Clones regular expressions and flags, and preserves the .lastIndex.

const regex = clone(/foo/g); //=> /foo/g
// you can manually reset lastIndex if necessary
regex.lastIndex = 0;


Simply returns primitives unchanged.

clone(0); //=> 0
clone('foo'); //=> 'foo'



Pull requests and stars are always welcome. For bugs and feature requests, please create an issue.

Running Tests

Running and reviewing unit tests is a great way to get familiarized with a library and its API. You can install dependencies and run tests with the following command:

$ npm install && npm test
Building docs

(This project's is generated by verb, please don't edit the readme directly. Any changes to the readme must be made in the readme template.)

To generate the readme, run the following command:

$ npm install -g verbose/verb#dev verb-generate-readme && verb

Related projects

You might also be interested in these projects:

  • assign-deep: Deeply assign the values of all enumerable-own-properties and symbols from one or more source objects… more | homepage
  • clone-deep: Recursively (deep) clone JavaScript native types, like Object, Array, RegExp, Date as well as primitives. | homepage
  • is-plain-object: Returns true if an object was created by the Object constructor. | homepage
  • kind-of: Get the native type of a value. | homepage


Commits Contributor
20 jonschlinkert
2 doowb
1 jakub-g


Jon Schlinkert


Copyright © 2019, Jon Schlinkert. Released under the MIT License.

This file was generated by verb-generate-readme, v0.8.0, on April 15, 2019.