# Is is-plain-object ESM-only? Can you require() it?

> is-plain-object@5.1.0 ships CommonJS and ESM builds. Dual package — require() works on every Node.js version we test; import works too.

Returns true if an object was created by the `Object` constructor, or Object.create(null).

Last verified Sep 9, 2026 against is-plain-object@5.1.0.

is-plain-object publishes both a CommonJS entry and a native ESM entry (ESM added in 5.0.0). require("is-plain-object") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=0.10.0. import "is-plain-object" works alongside it.

## What to do

1. Nothing to change. require("is-plain-object") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=0.10.0. import * as isPlainObject from "is-plain-object" works alongside it; use named imports for what the ESM entry exports.
2. TypeScript: types are bundled; install nothing extra.

## Facts

- Latest: 5.1.0 (Aug 21, 2026)
- Module format: Dual (CommonJS + ESM)
- Last CommonJS version: 5.1.0
- Native ESM since: 5.0.0
- TypeScript types: bundled
- Node engines: >=0.10.0
- Weekly downloads: 67.4M
- License: MIT

## Runtime test results for is-plain-object@5.1.0

Installed and executed on Sep 9, 2026 with require("is-plain-object") from a CommonJS file and import "is-plain-object" from an ES module.

| Runtime | require("is-plain-object") | import "is-plain-object" |
|---|---|---|
| Node.js 18 | works | works |
| Node.js 20 | works | works |
| Node.js 22 | works | works |
| Node.js 24 | works | works |
| Node.js 26 | works | works |
| Bun 1.4.0 | works | works |

## How to import is-plain-object

ES modules:

```js
import * as isPlainObject from "is-plain-object";
```

Namespace import shown because the ESM entry may have no default export; use named imports for what it exports.

CommonJS:

```js
const isPlainObject = require("is-plain-object");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (14 versions; the newest 14 shown).

| Versions | Format | First published |
|---|---|---|
| 5.0.0 – 5.1.0 | Dual (CommonJS + ESM) | Sep 9, 2020 |
| 0.1.0 – 4.1.1 | CommonJS | Sep 21, 2014 |

## Frequently asked

**Is is-plain-object ESM-only?**

is-plain-object@5.1.0 ships CommonJS and ESM builds. is-plain-object publishes both a CommonJS entry and a native ESM entry (ESM added in 5.0.0). require("is-plain-object") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=0.10.0. import "is-plain-object" works alongside it.

**Can I require is-plain-object?**

Yes. is-plain-object ships a CommonJS entry alongside the native ESM entry. require("is-plain-object") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=0.10.0.

**Does is-plain-object work in Bun?**

Yes. import "is-plain-object" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

**Does is-plain-object ship TypeScript types?**

Yes. is-plain-object bundles its own type declarations; no @types package is needed.

## Links

- [is-plain-object on npm](https://www.npmjs.com/package/is-plain-object)
- [Source repository](https://github.com/jonschlinkert/is-plain-object)
- [HTML version](https://canirequire.com/package/is-plain-object/)
- [JSON version](https://canirequire.com/package/is-plain-object.json)

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