sindresorhus/array-union

Create an array of unique values, in order, from the input arrays

TypeScript

26 commits

updated Sep 18, 2026

See the code

README

array-union

Create an array of unique values, in order, from the input arrays

Install

$ npm install array-union

Usage

import arrayUnion from 'array-union';

arrayUnion([1, 1, 2, 3], [2, 3]);
//=> [1, 2, 3]

arrayUnion(['foo', 'foo', 'bar']);
//=> ['foo', 'bar']

arrayUnion(['🐱', '🦄', '🐻'], ['🦄', '🌈']);
//=> ['🐱', '🦄', '🐻', '🌈']

arrayUnion(['🐱', '🦄'], ['🐻', '🦄'], ['🐶', '🌈', '🌈']);
//=> ['🐱', '🦄', '🐻', '🐶', '🌈']

Get professional support for this package with a Tidelift subscription
_{Tidelift helps make open source sustainable for maintainers while giving companies
assurances about security, maintenance, and licensing for their dependencies.}

Significant stargazers

Shawn Jonnet

52 followers · starred Mar 2021

Similar repos

sindresorhus/array-uniq

Create an array without duplicates

same org

sindresorhus/array-differ

Create an array with values that are present in the first input array but not additional ones

same org

sindresorhus/arrify

Convert a value to an array

132

same org

sindresorhus/aggregate-error

Create an error from multiple errors

247

same org

tc39/proposal-array-unique

ECMAScript proposal for Deduplicating method of Array

136

sindresorhus/type-fest

A collection of essential TypeScript types

17,433

same org

sindresorhus/yocto-queue

Tiny queue data structure

439

same org

blakeembrey/array-flatten

Flatten a multi-dimensional array in JavaScript.

sindresorhus/array-union

Create an array of unique values, in order, from the input arrays

TypeScript

26 commits

updated Sep 18, 2026

See the code

README

array-union

Create an array of unique values, in order, from the input arrays

Install

$ npm install array-union

Usage

import arrayUnion from 'array-union';

arrayUnion([1, 1, 2, 3], [2, 3]);
//=> [1, 2, 3]

arrayUnion(['foo', 'foo', 'bar']);
//=> ['foo', 'bar']

arrayUnion(['🐱', '🦄', '🐻'], ['🦄', '🌈']);
//=> ['🐱', '🦄', '🐻', '🌈']

arrayUnion(['🐱', '🦄'], ['🐻', '🦄'], ['🐶', '🌈', '🌈']);
//=> ['🐱', '🦄', '🐻', '🐶', '🌈']