canirequire › CommonJS › isobject
Is isobject ESM-only? Can you require() it?
Returns true if the value is an object and not an array or null.
Last verified Sep 9, 2026 against isobject@4.1.1. JSON
CommonJS CommonJS — require() works on every Node.js version
isobject ships CommonJS only. require("isobject") works everywhere. import "isobject" 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 isobject@4.1.1 actually load? Runtime test results
Installed and executed on Sep 9, 2026 with require("isobject") from a CommonJS file and import "isobject" from an ES module.
| Runtime | require("isobject") | import "isobject" |
|---|---|---|
| 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 isobject
ES modules (import)
import isobject from "isobject";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 isobject = require("isobject");Module format by version
Derived from the type, main and exports fields of every stable release on npm (12 versions; the newest 12 shown).
| Versions | Format | First published |
|---|---|---|
| 0.1.0 – 4.1.1 | CommonJS | Jun 30, 2014 |
Frequently asked
Is isobject ESM-only?
isobject@4.1.1 is a CommonJS package. isobject ships CommonJS only. require("isobject") works everywhere. import "isobject" 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 isobject with ES module syntax?
Yes. import isobject from "isobject" 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 isobject work in Bun?
Yes. import "isobject" loaded successfully in Bun 1.4 on Sep 9, 2026.
Does isobject ship TypeScript types?
Yes. isobject bundles its own type declarations; no @types package is needed.
Links
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