canirequire › CommonJS › util
Is util ESM-only? Can you require() it?
Node.js's util module for all engines
Last verified Sep 9, 2026 against util@0.12.5. JSON
CommonJS CommonJS — require() works on every Node.js version
util ships CommonJS only. require("util") works everywhere. import "util" 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 util@0.12.5 actually load? Runtime test results
Installed and executed on Sep 9, 2026 with require("util") from a CommonJS file and import "util" from an ES module.
| Runtime | require("util") | import "util" |
|---|---|---|
| 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 util
ES modules (import)
import util from "util";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 util = require("util");Module format by version
Derived from the type, main and exports fields of every stable release on npm (14 versions; the newest 14 shown).
| Versions | Format | First published |
|---|---|---|
| 0.4.9 – 0.12.5 | CommonJS | Sep 7, 2011 |
Frequently asked
Is util ESM-only?
util@0.12.5 is a CommonJS package. util ships CommonJS only. require("util") works everywhere. import "util" 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 util with ES module syntax?
Yes. import util from "util" 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 util work in Bun?
Yes. import "util" loaded successfully in Bun 1.4 on Sep 9, 2026.
Does util ship TypeScript types?
No. util ships no type declarations and there is no @types package for it.
Links
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