canirequire › CommonJS › nock
Is nock ESM-only? Can you require() it?
HTTP server mocking and expectations library for Node.js
Last verified Sep 9, 2026 against nock@14.0.17. JSON
CommonJS CommonJS — require() works on every Node.js version
nock ships CommonJS only. require("nock") works everywhere. import "nock" 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 nock@14.0.17 actually load? Runtime test results
Installed and executed on Sep 9, 2026 with require("nock") from a CommonJS file and import "nock" from an ES module.
| Runtime | require("nock") | import "nock" |
|---|---|---|
| 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 nock
ES modules (import)
import nock from "nock";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 nock = require("nock");Module format by version
Derived from the type, main and exports fields of every stable release on npm (395 versions; the newest 60 shown).
| Versions | Format | First published |
|---|---|---|
| 13.0.3 – 15.0.0 | CommonJS | Jul 27, 2020 |
Frequently asked
Is nock ESM-only?
nock@14.0.17 is a CommonJS package. nock ships CommonJS only. require("nock") works everywhere. import "nock" 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 nock with ES module syntax?
Yes. import nock from "nock" 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 nock work in Bun?
Yes. import "nock" loaded successfully in Bun 1.4 on Sep 9, 2026.
Does nock ship TypeScript types?
Yes. nock bundles its own type declarations; no @types package is needed.
Links
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