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Is setimmediate ESM-only? Can you require() it?

A shim for the setImmediate efficient script yielding API

Last verified Sep 9, 2026 against setimmediate@1.0.5. JSON

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

setimmediate ships CommonJS only. require("setimmediate") works everywhere. import "setimmediate" 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.

Latest
1.0.5 (Sep 12, 2016)
Module format
CommonJS
Last CommonJS version
1.0.5
TypeScript types
@types/setimmediate
Node engines
not declared
Weekly downloads
50.7M
License
MIT

Does setimmediate@1.0.5 actually load? Runtime test results

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

Runtimerequire("setimmediate")import "setimmediate"
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 setimmediate

ES modules (import)

import setimmediate from "setimmediate";

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 setimmediate = require("setimmediate");

Module format by version

Derived from the type, main and exports fields of every stable release on npm (6 versions; the newest 6 shown).

VersionsFormatFirst published
1.0.0 – 1.0.5CommonJSDec 31, 2012

Frequently asked

Is setimmediate ESM-only?

setimmediate@1.0.5 is a CommonJS package. setimmediate ships CommonJS only. require("setimmediate") works everywhere. import "setimmediate" 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 setimmediate with ES module syntax?

Yes. import setimmediate from "setimmediate" 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 setimmediate work in Bun?

Yes. import "setimmediate" loaded successfully in Bun 1.4 on Sep 9, 2026.

Does setimmediate ship TypeScript types?

Not bundled. Install the community types with "npm install -D @types/setimmediate".

Links

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