canirequire › CommonJS › koa-router
Is koa-router ESM-only? Can you require() it?
Router middleware for koa. Maintained by Forward Email and Lad.
Last verified Sep 9, 2026 against koa-router@14.0.0. JSON
CommonJS CommonJS — require() works on every Node.js version
koa-router ships CommonJS only. require("koa-router") works everywhere. import "koa-router" 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.
Deprecated: Please use @koa/router instead, starting from v9!
Does koa-router@14.0.0 actually load? Runtime test results
Installed and executed on Sep 9, 2026 with require("koa-router") from a CommonJS file and import "koa-router" from an ES module.
| Runtime | require("koa-router") | import "koa-router" |
|---|---|---|
| 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 koa-router
ES modules (import)
import koaRouter from "koa-router";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 koaRouter = require("koa-router");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 |
|---|---|---|
| 3.1.4 – 14.0.0 | CommonJS | May 12, 2014 |
Frequently asked
Is koa-router ESM-only?
koa-router@14.0.0 is a CommonJS package. koa-router ships CommonJS only. require("koa-router") works everywhere. import "koa-router" 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 koa-router with ES module syntax?
Yes. import koaRouter from "koa-router" 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 koa-router work in Bun?
Yes. import "koa-router" loaded successfully in Bun 1.4 on Sep 9, 2026.
Does koa-router ship TypeScript types?
Not bundled. Install the community types with "npm install -D @types/koa-router".
Links
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