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Is define-lazy-prop ESM-only? Can you require() it?

Define a lazily evaluated property on an object

Last verified Sep 9, 2026 against define-lazy-prop@3.0.0. Markdown · JSON

ESM-only ESM-only since 3.0.0 — last CommonJS version is 2.0.0

define-lazy-prop dropped its CommonJS build in 3.0.0 (April 2021). The last version with a plain require()-able CommonJS entry is 2.0.0, published Apr 10, 2019; it declares support for Node.js >=8.

On Node.js 20.19+, 22.12+ and newer, require("define-lazy-prop") works with the latest version: Node.js loads synchronous ES modules through require(). Verified on Node.js 20, 22, 24 and 26. On Node.js 18, which has no require(esm), require("define-lazy-prop") fails with ERR_REQUIRE_ESM.

What to do

  1. On Node.js 20.19+, 22.12+ and newer, require("define-lazy-prop") works with the latest version: Node.js loads synchronous ES modules through require(). Verified on Node.js 20, 22, 24 and 26.
  2. From a CommonJS file, use a dynamic import inside an async function: const defineLazyProp = await import("define-lazy-prop"). That works on every Node.js version the package supports (>=12).
  3. If you need a synchronous require() or run Node.js 18: npm install define-lazy-prop@2.0.0, the last CommonJS release (published Apr 10, 2019); it declares Node.js >=8.
  4. TypeScript: npm install -D @types/define-lazy-prop
Latest
3.0.0 (Apr 14, 2021)
Module format
ESM-only
Last CommonJS version
2.0.0
ESM-only since
3.0.0 (Apr 14, 2021)
TypeScript types
@types/define-lazy-prop
Node engines
>=12
Weekly downloads
87.5M
License
MIT

Does define-lazy-prop@3.0.0 actually load? Runtime test results

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

Runtimerequire("define-lazy-prop")import "define-lazy-prop"
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 1.4.0✓ works✓ works

How to import define-lazy-prop

ES modules (import)

import * as defineLazyProp from "define-lazy-prop";

Namespace import shown because the ESM entry may have no default export; use named imports for what it exports.

CommonJS (require)

// Node.js 20.19+, 22.12+ and newer (verified):
const defineLazyProp = require("define-lazy-prop");

// Any Node.js version the package supports (>=12), from an async function:
async function main() {
  const defineLazyProp = await import("define-lazy-prop");
}

// Or pin the last CommonJS release (declares Node.js >=8):
// npm install define-lazy-prop@2.0.0

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 (3 versions; the newest 3 shown).

VersionsFormatFirst published
3.0.0ESM-onlyApr 14, 2021
1.0.0 – 2.0.0CommonJSJan 15, 2017

Frequently asked

Is define-lazy-prop ESM-only?

define-lazy-prop@3.0.0 is ESM-only. define-lazy-prop dropped its CommonJS build in 3.0.0 (April 2021). The last version with a plain require()-able CommonJS entry is 2.0.0, published Apr 10, 2019; it declares support for Node.js >=8.

Which version of define-lazy-prop still supports CommonJS / require()?

2.0.0 is the last version of define-lazy-prop with a CommonJS build; it declares Node.js >=8. Install it with "npm install define-lazy-prop@2.0.0". Every version from 3.0.0 on is ESM-only.

How do I use define-lazy-prop from a CommonJS file?

From a CommonJS file, use a dynamic import inside an async function: const defineLazyProp = await import("define-lazy-prop"). That works on every Node.js version the package supports (>=12). On Node.js 20.19+, 22.12+ and newer, require("define-lazy-prop") works with the latest version: Node.js loads synchronous ES modules through require(). Verified on Node.js 20, 22, 24 and 26. Alternatively pin define-lazy-prop@2.0.0 (declares Node.js >=8).

Does define-lazy-prop work in Bun?

Yes. import "define-lazy-prop" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

Does define-lazy-prop ship TypeScript types?

Not bundled. Install the community types with "npm install -D @types/define-lazy-prop".

Links

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