canirequire › Dual (CommonJS + ESM) › @jest/fake-timers
Is @jest/fake-timers ESM-only? Can you require() it?
Last verified Sep 9, 2026 against @jest/fake-timers@30.5.1. JSON
Dual (CommonJS + ESM) Dual package — both require() and import work
@jest/fake-timers publishes both a CommonJS entry and a native ESM entry (ESM added in 30.0.0). require("@jest/fake-timers") and import "@jest/fake-timers" both work on every supported Node.js version and in Bun.
Does @jest/fake-timers@30.5.1 actually load? Runtime test results
Installed and executed on Sep 9, 2026 with require("@jest/fake-timers") from a CommonJS file and import "@jest/fake-timers" from an ES module.
| Runtime | require("@jest/fake-timers") | import "@jest/fake-timers" |
|---|---|---|
| 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 @jest/fake-timers
ES modules (import)
import fakeTimers from "@jest/fake-timers";CommonJS (require)
const fakeTimers = require("@jest/fake-timers");Module format by version
Derived from the type, main and exports fields of every stable release on npm (92 versions; the newest 60 shown).
| Versions | Format | First published |
|---|---|---|
| 30.0.0 – 30.5.1 | Dual (CommonJS + ESM) | Jun 10, 2025 |
| 27.0.6 – 29.7.0 | CommonJS | Jun 28, 2021 |
Frequently asked
Is @jest/fake-timers ESM-only?
@jest/fake-timers@30.5.1 ships CommonJS and ESM builds. @jest/fake-timers publishes both a CommonJS entry and a native ESM entry (ESM added in 30.0.0). require("@jest/fake-timers") and import "@jest/fake-timers" both work on every supported Node.js version and in Bun.
Can I require @jest/fake-timers?
Yes. @jest/fake-timers ships a CommonJS entry, so require("@jest/fake-timers") works on every Node.js version, alongside the native ESM entry for import.
Does @jest/fake-timers work in Bun?
Yes. import "@jest/fake-timers" loaded successfully in Bun 1.4 on Sep 9, 2026.
Does @jest/fake-timers ship TypeScript types?
Yes. @jest/fake-timers bundles its own type declarations; no @types package is needed.
Links
Other dual (commonjs + esm) packages
- minimatch 10.2.6Dual
- brace-expansion 5.0.9Dual
- lru-cache 11.5.2Dual
- glob 13.0.6Dual
- eslint-visitor-keys 5.0.1Dual
- yallist 5.0.0Dual
- balanced-match 4.0.4Dual
- js-yaml 5.4.1Dual
Similar popularity
- @smithy/signature-v4 5.7.3CommonJS
- @aws-sdk/credential-provider-http 3.972.72CommonJS
- @istanbuljs/schema 0.1.6CommonJS
- @sindresorhus/is 8.1.0ESM-only
- @jest/transform 30.5.1Dual
- @babel/helper-member-expression-to-functions 8.0.0ESM-only
- @opentelemetry/api 1.9.1CommonJS
- @img/sharp-linux-x64 0.35.4CommonJS