canirequire › CommonJS › levn
Is levn ESM-only? Can you require() it?
Light ECMAScript (JavaScript) Value Notation - human written, concise, typed, flexible
Last verified Sep 9, 2026 against levn@0.4.1. JSON
CommonJS CommonJS — require() works on every Node.js version
levn ships CommonJS only. require("levn") works everywhere. import "levn" also works because Node.js and Bun can import CommonJS from ES modules, but only the default export is guaranteed; named imports depend on Node's static analysis of the module.
Does levn@0.4.1 actually load? Runtime test results
Installed and executed on Sep 9, 2026 with require("levn") from a CommonJS file and import "levn" from an ES module.
| Runtime | require("levn") | import "levn" |
|---|---|---|
| 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 | ✓ works | ✓ works |
How to import levn
ES modules (import)
import levn from "levn";Named imports from a CommonJS package only work when Node.js can statically detect them. If a named import fails, use the default import and destructure.
CommonJS (require)
const levn = require("levn");Module format by version
Derived from the type, main and exports fields of every stable release on npm (10 versions; the newest 10 shown).
| Versions | Format | First published |
|---|---|---|
| 0.1.0 – 0.4.1 | CommonJS | Oct 4, 2013 |
Frequently asked
Is levn ESM-only?
levn@0.4.1 is a CommonJS package. levn ships CommonJS only. require("levn") works everywhere. import "levn" also works because Node.js and Bun can import CommonJS from ES modules, but only the default export is guaranteed; named imports depend on Node's static analysis of the module.
Can I import levn with ES module syntax?
Yes. import levn from "levn" works in Node.js and Bun because they support importing CommonJS modules. Named imports work only when Node.js can statically detect the exports.
Does levn work in Bun?
Yes. import "levn" loaded successfully in Bun 1.4 on Sep 9, 2026.
Does levn ship TypeScript types?
Not bundled. Install the community types with "npm install -D @types/levn".
Links
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