canirequire › CommonJS › yup
Is yup ESM-only? Can you require() it?
Dead simple Object schema validation
Last verified Sep 9, 2026 against yup@1.7.1. JSON
CommonJS CommonJS — require() works on every Node.js version
yup ships CommonJS only. require("yup") works everywhere. import "yup" 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 yup@1.7.1 actually load? Runtime test results
Installed and executed on Sep 9, 2026 with require("yup") from a CommonJS file and import "yup" from an ES module.
| Runtime | require("yup") | import "yup" |
|---|---|---|
| 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 yup
ES modules (import)
import yup from "yup";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 yup = require("yup");Module format by version
Derived from the type, main and exports fields of every stable release on npm (119 versions; the newest 60 shown).
| Versions | Format | First published |
|---|---|---|
| 0.22.0 – 1.7.1 | CommonJS | Aug 26, 2017 |
Frequently asked
Is yup ESM-only?
yup@1.7.1 is a CommonJS package. yup ships CommonJS only. require("yup") works everywhere. import "yup" 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 yup with ES module syntax?
Yes. import yup from "yup" 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 yup work in Bun?
Yes. import "yup" loaded successfully in Bun 1.4 on Sep 9, 2026.
Does yup ship TypeScript types?
Yes. yup bundles its own type declarations; no @types package is needed.
Links
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