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Is @oclif/dev-cli ESM-only? Can you require() it?

helpers for oclif CLIs

Last verified Sep 9, 2026 against @oclif/dev-cli@1.26.10. Markdown · JSON

CommonJS CommonJS — require() works on every Node.js version we test

@oclif/dev-cli ships CommonJS only. require("@oclif/dev-cli") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=8.10.0. import "@oclif/dev-cli" 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.

What to do

  1. require("@oclif/dev-cli") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=8.10.0.
  2. From ES modules use the default import: import devCli from "@oclif/dev-cli"; then destructure. Named imports only work when Node.js can statically detect the exports.
  3. TypeScript: types are bundled; install nothing extra.
  4. This package is deprecated: Package no longer supported. Contact Support at https://www.npmjs.com/support for more info.
Latest
1.26.10 (Dec 15, 2021)
Module format
CommonJS
Last CommonJS version
1.26.10
TypeScript types
Bundled
Node engines
>=8.10.0
Weekly downloads
52K
License
MIT

Deprecated: Package no longer supported. Contact Support at https://www.npmjs.com/support for more info.

Does @oclif/dev-cli@1.26.10 actually load? Runtime test results

Installed and executed on Sep 9, 2026 with require("@oclif/dev-cli") from a CommonJS file and import "@oclif/dev-cli" from an ES module.

Runtimerequire("@oclif/dev-cli")import "@oclif/dev-cli"
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 1.4.0✓ works✓ works

How to import @oclif/dev-cli

ES modules (import)

import devCli from "@oclif/dev-cli";

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 devCli = require("@oclif/dev-cli");

Module format by version

Derived from the type, main and exports fields of every stable release on npm, corrected where a runtime test of that version contradicted them (160 versions; the newest 60 shown).

VersionsFormatFirst published
1.13.18 – 1.26.10CommonJSMay 4, 2018

Frequently asked

Is @oclif/dev-cli ESM-only?

@oclif/dev-cli@1.26.10 is a CommonJS package. @oclif/dev-cli ships CommonJS only. require("@oclif/dev-cli") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=8.10.0. import "@oclif/dev-cli" 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 @oclif/dev-cli with ES module syntax?

Yes. import devCli from "@oclif/dev-cli" 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 @oclif/dev-cli work in Bun?

Yes. import "@oclif/dev-cli" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

Does @oclif/dev-cli ship TypeScript types?

Yes. @oclif/dev-cli bundles its own type declarations; no @types package is needed.

Links

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