# Is @alloc/quick-lru ESM-only? Can you require() it?

> @alloc/quick-lru@5.3.0 is a CommonJS package. CommonJS — require() works on every Node.js version we test.

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Last verified Sep 9, 2026 against @alloc/quick-lru@5.3.0.

@alloc/quick-lru ships CommonJS only. require("@alloc/quick-lru") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=10. import "@alloc/quick-lru" 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("@alloc/quick-lru") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=10.
2. From ES modules use the default import: import quickLru from "@alloc/quick-lru"; then destructure. Named imports only work when Node.js can statically detect the exports.
3. TypeScript: types are bundled; install nothing extra.

## Facts

- Latest: 5.3.0 (Aug 31, 2026)
- Module format: CommonJS
- Last CommonJS version: 5.3.0
- TypeScript types: bundled
- Node engines: >=10
- Weekly downloads: 25.7M
- License: MIT

## Runtime test results for @alloc/quick-lru@5.3.0

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

| Runtime | require("@alloc/quick-lru") | import "@alloc/quick-lru" |
|---|---|---|
| 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 @alloc/quick-lru

ES modules:

```js
import quickLru from "@alloc/quick-lru";
```

CommonJS:

```js
const quickLru = require("@alloc/quick-lru");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (2 versions; the newest 2 shown).

| Versions | Format | First published |
|---|---|---|
| 5.2.0 – 5.3.0 | CommonJS | Apr 6, 2021 |

## Frequently asked

**Is @alloc/quick-lru ESM-only?**

@alloc/quick-lru@5.3.0 is a CommonJS package. @alloc/quick-lru ships CommonJS only. require("@alloc/quick-lru") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=10. import "@alloc/quick-lru" 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 @alloc/quick-lru with ES module syntax?**

Yes. import quickLru from "@alloc/quick-lru" 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 @alloc/quick-lru work in Bun?**

Yes. import "@alloc/quick-lru" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

**Does @alloc/quick-lru ship TypeScript types?**

Yes. @alloc/quick-lru bundles its own type declarations; no @types package is needed.

## Links

- [@alloc/quick-lru on npm](https://www.npmjs.com/package/@alloc/quick-lru)
- [Source repository](https://github.com/aleclarson/quick-lru)
- [HTML version](https://canirequire.com/package/@alloc/quick-lru/)
- [JSON version](https://canirequire.com/package/@alloc/quick-lru.json)

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