canirequire › CommonJS › has-proto
Is has-proto ESM-only? Can you require() it?
Does this environment have the ability to get the [[Prototype]] of an object on creation with `__proto__`?
Last verified Sep 9, 2026 against has-proto@1.2.0. JSON
CommonJS CommonJS — require() works on every Node.js version
has-proto ships CommonJS only. require("has-proto") works everywhere. import "has-proto" 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.
Does has-proto@1.2.0 actually load? Runtime test results
Installed and executed on Sep 9, 2026 with require("has-proto") from a CommonJS file and import "has-proto" from an ES module.
| Runtime | require("has-proto") | import "has-proto" |
|---|---|---|
| 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 has-proto
ES modules (import)
import hasProto from "has-proto";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 hasProto = require("has-proto");Module format by version
Derived from the type, main and exports fields of every stable release on npm (6 versions; the newest 6 shown).
| Versions | Format | First published |
|---|---|---|
| 1.0.0 – 1.2.0 | CommonJS | Dec 13, 2022 |
Frequently asked
Is has-proto ESM-only?
has-proto@1.2.0 is a CommonJS package. has-proto ships CommonJS only. require("has-proto") works everywhere. import "has-proto" 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 has-proto with ES module syntax?
Yes. import hasProto from "has-proto" 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 has-proto work in Bun?
Yes. import "has-proto" loaded successfully in Bun 1.4 on Sep 9, 2026.
Does has-proto ship TypeScript types?
Yes. has-proto bundles its own type declarations; no @types package is needed.
Links
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