# Is codemirror ESM-only? Can you require() it?

> codemirror@6.0.2 ships CommonJS and ESM builds. Dual package — require() works on every Node.js version we test; import works too.

Basic configuration for the CodeMirror code editor

Last verified Sep 9, 2026 against codemirror@6.0.2.

codemirror publishes both a CommonJS entry and a native ESM entry (ESM added in 6.0.0). require("codemirror") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "codemirror" works alongside it.

## What to do

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

## Facts

- Latest: 6.0.2 (Jun 19, 2025)
- Module format: Dual (CommonJS + ESM)
- Last CommonJS version: 6.0.2
- Native ESM since: 6.0.0
- TypeScript types: bundled
- Node engines: not declared
- Weekly downloads: 7.1M
- License: MIT

## Runtime test results for codemirror@6.0.2

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

| Runtime | require("codemirror") | import "codemirror" |
|---|---|---|
| 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 codemirror

ES modules:

```js
import * as codemirror from "codemirror";
```

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

CommonJS:

```js
const codemirror = require("codemirror");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (155 versions; the newest 60 shown).

| Versions | Format | First published |
|---|---|---|
| 6.65.7 | CommonJS | Jul 20, 2022 |
| 6.0.0 – 6.0.2 | Dual (CommonJS + ESM) | Jun 8, 2022 |
| 5.49.0 – 5.65.21 | CommonJS | Sep 20, 2019 |

## Frequently asked

**Is codemirror ESM-only?**

codemirror@6.0.2 ships CommonJS and ESM builds. codemirror publishes both a CommonJS entry and a native ESM entry (ESM added in 6.0.0). require("codemirror") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "codemirror" works alongside it.

**Can I require codemirror?**

Yes. codemirror ships a CommonJS entry alongside the native ESM entry. require("codemirror") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun.

**Does codemirror work in Bun?**

Yes. import "codemirror" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

**Does codemirror ship TypeScript types?**

Yes. codemirror bundles its own type declarations; no @types package is needed.

## Links

- [codemirror on npm](https://www.npmjs.com/package/codemirror)
- [Source repository](https://github.com/codemirror/basic-setup)
- [HTML version](https://canirequire.com/package/codemirror/)
- [JSON version](https://canirequire.com/package/codemirror.json)

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