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Is yocto-queue ESM-only? Can you require() it?

Tiny queue data structure

Last verified Sep 9, 2026 against yocto-queue@1.2.2. JSON

ESM-only ESM-only since 1.0.0 — last CommonJS version is 0.1.0

yocto-queue dropped its CommonJS build in 1.0.0 (August 2021). The last version you can require() on every Node.js version, including 18 and older, is 0.1.0, published Nov 24, 2020.

On Node.js 20.19+, 22.12+ and every newer release, require("yocto-queue") works anyway: Node can load synchronous ES modules through require(). Verified on Node 20, 22, 24, 26. Node.js 18 and older still fail with ERR_REQUIRE_ESM.

Latest
1.2.2 (Nov 11, 2025)
Module format
ESM-only
Last CommonJS version
0.1.0
ESM-only since
1.0.0 (Aug 12, 2021)
TypeScript types
Bundled
Node engines
>=12.20
Weekly downloads
170.0M
License
MIT

Does yocto-queue@1.2.2 actually load? Runtime test results

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

Runtimerequire("yocto-queue")import "yocto-queue"
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✓ works✓ works

How to import yocto-queue

ES modules (import)

import yoctoQueue from "yocto-queue";

CommonJS (require)

// Node.js 20.19+ / 22.12+ / newer (package has no top-level await):
const yoctoQueue = require("yocto-queue");

// Any Node.js version:
const yoctoQueue = await import("yocto-queue");

// Or pin the last CommonJS release:
// npm install yocto-queue@0.1.0

Module format by version

Derived from the type, main and exports fields of every stable release on npm (8 versions; the newest 8 shown).

VersionsFormatFirst published
1.0.0 – 1.2.2ESM-onlyAug 12, 2021
0.0.0 – 0.1.0CommonJSNov 24, 2020

Frequently asked

Is yocto-queue ESM-only?

yocto-queue@1.2.2 is ESM-only. yocto-queue dropped its CommonJS build in 1.0.0 (August 2021). The last version you can require() on every Node.js version, including 18 and older, is 0.1.0, published Nov 24, 2020.

Which version of yocto-queue still supports CommonJS / require()?

0.1.0 is the last version of yocto-queue with a CommonJS build. Install it with "npm install yocto-queue@0.1.0". Every version from 1.0.0 on is ESM-only.

How do I use yocto-queue from a CommonJS file?

Use a dynamic import: const mod = await import("yocto-queue"). On Node.js 20.19+, 22.12+ and newer, a plain require("yocto-queue") also works for ESM packages that do not use top-level await. Alternatively pin yocto-queue@0.1.0.

Does yocto-queue work in Bun?

Yes. import "yocto-queue" loaded successfully in Bun 1.4 on Sep 9, 2026.

Does yocto-queue ship TypeScript types?

Yes. yocto-queue bundles its own type declarations; no @types package is needed.

Links

Other esm-only packages

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