# Is eslint-visitor-keys ESM-only? Can you require() it?

> eslint-visitor-keys@5.0.1 ships CommonJS and ESM builds. Dual package — require() works on every Node.js version we test; import works too.

Constants and utilities about visitor keys to traverse AST.

Last verified Sep 9, 2026 against eslint-visitor-keys@5.0.1.

eslint-visitor-keys publishes both a CommonJS entry and a native ESM entry (ESM added in 3.0.0). require("eslint-visitor-keys") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js ^20.19.0 || ^22.13.0 || >=24. import "eslint-visitor-keys" works alongside it.

## What to do

1. Nothing to change. require("eslint-visitor-keys") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js ^20.19.0 || ^22.13.0 || >=24. import * as eslintVisitorKeys from "eslint-visitor-keys" works alongside it; use named imports for what the ESM entry exports.
2. TypeScript: types are bundled; install nothing extra.

## Facts

- Latest: 5.0.1 (Feb 20, 2026)
- Module format: Dual (CommonJS + ESM)
- Last CommonJS version: 5.0.1
- Native ESM since: 3.0.0
- TypeScript types: bundled
- Node engines: ^20.19.0 || ^22.13.0 || >=24
- Weekly downloads: 340.8M
- License: Apache-2.0

## Runtime test results for eslint-visitor-keys@5.0.1

Installed and executed on Sep 9, 2026 with require("eslint-visitor-keys") from a CommonJS file and import "eslint-visitor-keys" from an ES module.

| Runtime | require("eslint-visitor-keys") | import "eslint-visitor-keys" |
|---|---|---|
| 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 eslint-visitor-keys

ES modules:

```js
import * as eslintVisitorKeys from "eslint-visitor-keys";
```

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

CommonJS:

```js
const eslintVisitorKeys = require("eslint-visitor-keys");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (21 versions; the newest 21 shown).

| Versions | Format | First published |
|---|---|---|
| 3.0.0 – 5.0.1 | Dual (CommonJS + ESM) | Jun 24, 2021 |
| 0.1.0 – 2.1.0 | CommonJS | Nov 17, 2017 |

## Frequently asked

**Is eslint-visitor-keys ESM-only?**

eslint-visitor-keys@5.0.1 ships CommonJS and ESM builds. eslint-visitor-keys publishes both a CommonJS entry and a native ESM entry (ESM added in 3.0.0). require("eslint-visitor-keys") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js ^20.19.0 || ^22.13.0 || >=24. import "eslint-visitor-keys" works alongside it.

**Can I require eslint-visitor-keys?**

Yes. eslint-visitor-keys ships a CommonJS entry alongside the native ESM entry. require("eslint-visitor-keys") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js ^20.19.0 || ^22.13.0 || >=24.

**Does eslint-visitor-keys work in Bun?**

Yes. import "eslint-visitor-keys" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

**Does eslint-visitor-keys ship TypeScript types?**

Yes. eslint-visitor-keys bundles its own type declarations; no @types package is needed.

## Links

- [eslint-visitor-keys on npm](https://www.npmjs.com/package/eslint-visitor-keys)
- [Source repository](https://github.com/eslint/js)
- [HTML version](https://canirequire.com/package/eslint-visitor-keys/)
- [JSON version](https://canirequire.com/package/eslint-visitor-keys.json)

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