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Is react-router ESM-only? Can you require() it?

Declarative routing for React

Last verified Sep 9, 2026 against react-router@8.3.1. JSON

ESM-only ESM-only since 7.7.0 — last CommonJS version is 7.6.3

react-router dropped its CommonJS build in 7.7.0 (July 2025). The last version you can require() on every Node.js version, including 18 and older, is 7.6.3, published Jun 27, 2025.

On Node.js 20.19+, 22.12+ and every newer release, require("react-router") works anyway: Node can load synchronous ES modules through require(). Verified on Node 22, 24, 26. Node.js 18 and older still fail with ERR_REQUIRE_ESM.

react-router@8.3.1 declares engines ">=22.22.0", so Node.js 18, 20 are outside its supported range regardless of module format.

Latest
8.3.1 (Aug 28, 2026)
Module format
ESM-only
Last CommonJS version
7.6.3
ESM-only since
7.7.0 (Jul 16, 2025)
TypeScript types
Bundled
Node engines
>=22.22.0
Weekly downloads
46.6M
License
MIT

Does react-router@8.3.1 actually load? Runtime test results

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

Runtimerequire("react-router")import "react-router"
Node.js 18✗ failsERR_REQUIRE_ESM✓ works
Node.js 20✓ works✓ works
Node.js 22✓ works✓ works
Node.js 24✓ works✓ works
Node.js 26✓ works✓ works
Bun 1.4✓ works✓ works

How to import react-router

ES modules (import)

import reactRouter from "react-router";

CommonJS (require)

// Node.js 20.19+ / 22.12+ / newer (package has no top-level await):
const reactRouter = require("react-router");

// Any Node.js version:
const reactRouter = await import("react-router");

// Or pin the last CommonJS release:
// npm install react-router@7.6.3

Module format by version

Derived from the type, main and exports fields of every stable release on npm (222 versions; the newest 60 shown).

VersionsFormatFirst published
7.7.0 – 8.3.1ESM-onlyJul 16, 2025
7.0.0 – 7.6.3Dual (CommonJS + ESM)Nov 22, 2024
6.30.4 – 6.30.6CommonJSMay 29, 2026

Frequently asked

Is react-router ESM-only?

react-router@8.3.1 is ESM-only. react-router dropped its CommonJS build in 7.7.0 (July 2025). The last version you can require() on every Node.js version, including 18 and older, is 7.6.3, published Jun 27, 2025.

Which version of react-router still supports CommonJS / require()?

7.6.3 is the last version of react-router with a CommonJS build. Install it with "npm install react-router@7.6.3". Every version from 7.7.0 on is ESM-only.

How do I use react-router from a CommonJS file?

Use a dynamic import: const mod = await import("react-router"). On Node.js 20.19+, 22.12+ and newer, a plain require("react-router") also works for ESM packages that do not use top-level await. Alternatively pin react-router@7.6.3.

Does react-router work in Bun?

Yes. import "react-router" loaded successfully in Bun 1.4 on Sep 9, 2026.

Does react-router ship TypeScript types?

Yes. react-router bundles its own type declarations; no @types package is needed.

Links

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