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Is js-tokens ESM-only? Can you require() it?

Tiny JavaScript tokenizer.

Last verified Sep 9, 2026 against js-tokens@10.0.0. JSON

ESM-only ESM-only since 10.0.0 — last CommonJS version is 9.0.1

js-tokens dropped its CommonJS build in 10.0.0 (December 2025). The last version you can require() on every Node.js version, including 18 and older, is 9.0.1, published Nov 22, 2024.

On Node.js 20.19+, 22.12+ and every newer release, require("js-tokens") works anyway: Node can load synchronous ES modules through require(). Verified on Node 20, 22, 24, 26. Node.js 18 and older still fail with ERR_REQUIRE_ESM.

Latest
10.0.0 (Dec 8, 2025)
Module format
ESM-only
Last CommonJS version
9.0.1
ESM-only since
10.0.0 (Dec 8, 2025)
TypeScript types
Bundled
Node engines
not declared
Weekly downloads
224.1M
License
MIT

Does js-tokens@10.0.0 actually load? Runtime test results

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

Runtimerequire("js-tokens")import "js-tokens"
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 js-tokens

ES modules (import)

import jsTokens from "js-tokens";

CommonJS (require)

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

// Any Node.js version:
const jsTokens = await import("js-tokens");

// Or pin the last CommonJS release:
// npm install js-tokens@9.0.1

Module format by version

Derived from the type, main and exports fields of every stable release on npm (25 versions; the newest 25 shown).

VersionsFormatFirst published
10.0.0ESM-onlyDec 8, 2025
0.1.0 – 9.0.1CommonJSMar 8, 2014

Frequently asked

Is js-tokens ESM-only?

js-tokens@10.0.0 is ESM-only. js-tokens dropped its CommonJS build in 10.0.0 (December 2025). The last version you can require() on every Node.js version, including 18 and older, is 9.0.1, published Nov 22, 2024.

Which version of js-tokens still supports CommonJS / require()?

9.0.1 is the last version of js-tokens with a CommonJS build. Install it with "npm install js-tokens@9.0.1". Every version from 10.0.0 on is ESM-only.

How do I use js-tokens from a CommonJS file?

Use a dynamic import: const mod = await import("js-tokens"). On Node.js 20.19+, 22.12+ and newer, a plain require("js-tokens") also works for ESM packages that do not use top-level await. Alternatively pin js-tokens@9.0.1.

Does js-tokens work in Bun?

Yes. import "js-tokens" loaded successfully in Bun 1.4 on Sep 9, 2026.

Does js-tokens ship TypeScript types?

Yes. js-tokens bundles its own type declarations; no @types package is needed.

Links

Other esm-only packages

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