# object-is

> ES2015-compliant shim for Object.is - differentiates between -0 and +0

Latest version **1.1.6** (published 2024-02-28) · MIT license · 0 weekly downloads

> **Native alternative:** Object.is — Use native JavaScript (Node 0.10.0+) (https://developer.mozilla.orgGlobal_Objects/Object/is)

## Install

```sh
npm install object-is
pnpm add object-is
yarn add object-is
bun add object-is
```

## Health

**Score 33/100 (F)** — status: abandoned.

Positive: has types package; no vulnerabilities; high quality score.

Warnings: low downloads; no esm support.

Negative: abandoned.

## Facts

| | |
|---|---|
| Version | 1.1.6 |
| Published | 2024-02-28 |
| First published | 2014-02-18 |
| Weekly downloads | 0 |
| License | MIT |
| TypeScript types | separate (@types/object-is) |
| Module format | CommonJS |
| Node | >= 0.4 |
| Dependencies | 2 |
| Unpacked size | 26.4 KB |
| Known vulnerabilities | 0 |
| Install scripts | no |
| GitHub stars | 24 |
| Author | Jordan Harband |
| Maintainers | ljharb |
| Keywords | is, Object.is, equality, sameValueZero, ES6, ES2015, shim, polyfill, es-shim API |

## Links

- npm: https://www.npmjs.com/package/object-is
- Repository: https://github.com/es-shims/object-is
- Issues: https://github.com/es-shims/object-is/issues
- Funding: https://github.com/sponsors/ljharb
- npm.io page: https://npm.io/package/object-is

## Dependencies (2)

- [call-bind](https://npm.io/package/call-bind.md) ^1.0.7
- [define-properties](https://npm.io/package/define-properties.md) ^1.2.1

## Alternatives

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- [cache2](https://npm.io/package/cache2.md) — 1.5K weekly downloads

## Recent versions

- 1.1.6 (latest) — 2024-02-28
- 1.1.5 — 2021-02-20
- 1.1.4 — 2020-11-27
- 1.1.3 — 2020-09-30
- 1.1.2 — 2020-04-14
- 1.1.1 — 2020-04-14
- 1.1.0 — 2020-04-14
- 1.0.2 — 2019-12-16
- 1.0.1 — 2014-08-28
- 1.0.0 — 2014-08-01
- 0.0.0 — 2014-02-18

## README

# object-is <sup>[![Version Badge][npm-version-svg]][package-url]</sup>

[![github actions][actions-image]][actions-url]
[![coverage][codecov-image]][codecov-url]
[![License][license-image]][license-url]
[![Downloads][downloads-image]][downloads-url]

[![npm badge][npm-badge-png]][package-url]

ES2015-compliant shim for Object.is - differentiates between -0 and +0, and can compare to NaN.

Essentially, Object.is returns the same value as === - but true for NaN, and false for -0 and +0.

This package implements the [es-shim API](https://github.com/es-shims/api) interface. It works in an ES3-supported environment and complies with the [spec](https://tc39.es/ecma262).

## Example

```js
Object.is = require('object-is');
var assert = require('assert');

assert.ok(Object.is());
assert.ok(Object.is(undefined));
assert.ok(Object.is(undefined, undefined));
assert.ok(Object.is(null, null));
assert.ok(Object.is(true, true));
assert.ok(Object.is(false, false));
assert.ok(Object.is('foo', 'foo'));

var arr = [1, 2];
assert.ok(Object.is(arr, arr));
assert.equal(Object.is(arr, [1, 2]), false);

assert.ok(Object.is(0, 0));
assert.ok(Object.is(-0, -0));
assert.equal(Object.is(0, -0), false);

assert.ok(Object.is(NaN, NaN));
assert.ok(Object.is(Infinity, Infinity));
assert.ok(Object.is(-Infinity, -Infinity));
```

## Tests
Simply clone the repo, `npm install`, and run `npm test`

[package-url]: https://npmjs.com/package/object-is
[npm-version-svg]: https://versionbadg.es/es-shims/object-is.svg
[deps-svg]: https://david-dm.org/es-shims/object-is.svg
[deps-url]: https://david-dm.org/es-shims/object-is
[dev-deps-svg]: https://david-dm.org/es-shims/object-is/dev-status.svg
[dev-deps-url]: https://david-dm.org/es-shims/object-is#info=devDependencies
[npm-badge-png]: https://nodei.co/npm/object-is.png?downloads=true&stars=true
[license-image]: https://img.shields.io/npm/l/object-is.svg
[license-url]: LICENSE
[downloads-image]: https://img.shields.io/npm/dm/object-is.svg
[downloads-url]: https://npm-stat.com/charts.html?package=object-is
[codecov-image]: https://codecov.io/gh/es-shims/object-is/branch/main/graphs/badge.svg
[codecov-url]: https://app.codecov.io/gh/es-shims/object-is/
[actions-image]: https://img.shields.io/endpoint?url=https://github-actions-badge-u3jn4tfpocch.runkit.sh/es-shims/object-is
[actions-url]: https://github.com/es-shims/object-is/actions

---
_Source: https://npm.io/package/object-is · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._