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

Basic configuration for the CodeMirror code editor

Last verified Sep 9, 2026 against codemirror@6.0.2. Markdown · JSON

Dual (CommonJS + ESM) Dual package — require() works on every Node.js version we test; import works too

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.
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

Does codemirror@6.0.2 actually load? Runtime test results

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

Runtimerequire("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 (import)

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 (require)

const codemirror = require("codemirror");

Module format by version

Derived from the type, main and exports fields of every stable release on npm, corrected where a runtime test of that version contradicted them (155 versions; the newest 60 shown).

VersionsFormatFirst published
6.65.7CommonJSJul 20, 2022
6.0.0 – 6.0.2Dual (CommonJS + ESM)Jun 8, 2022
5.49.0 – 5.65.21CommonJSSep 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

Other dual (commonjs + esm) packages

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