canirequire › CommonJS › zone.js
Is zone.js ESM-only? Can you require() it?
Zones for JavaScript
Last verified Sep 9, 2026 against zone.js@0.16.3. JSON
CommonJS CommonJS — require() works on every Node.js version
zone.js ships CommonJS only. require("zone.js") works everywhere. import "zone.js" 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.
It also declares a "module" field, so bundlers such as webpack, Vite and esbuild pick up an ESM build for tree-shaking.
Does zone.js@0.16.3 actually load? Runtime test results
Installed and executed on Sep 9, 2026 with require("zone.js") from a CommonJS file and import "zone.js" from an ES module.
| Runtime | require("zone.js") | import "zone.js" |
|---|---|---|
| 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 zone.js
ES modules (import)
import zoneJs from "zone.js";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 zoneJs = require("zone.js");Module format by version
Derived from the type, main and exports fields of every stable release on npm (129 versions; the newest 60 shown).
| Versions | Format | First published |
|---|---|---|
| 0.8.5 – 0.16.3 | CommonJS | Mar 21, 2017 |
Frequently asked
Is zone.js ESM-only?
zone.js@0.16.3 is a CommonJS package. zone.js ships CommonJS only. require("zone.js") works everywhere. import "zone.js" 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 zone.js with ES module syntax?
Yes. import zoneJs from "zone.js" 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 zone.js work in Bun?
Yes. import "zone.js" loaded successfully in Bun 1.4 on Sep 9, 2026.
Does zone.js ship TypeScript types?
Yes. zone.js bundles its own type declarations; no @types package is needed.
Links
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