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Is ajv-keywords ESM-only? Can you require() it?

Additional JSON-Schema keywords for Ajv JSON validator

Last verified Sep 9, 2026 against ajv-keywords@5.1.0. JSON

CommonJS CommonJS — require() works on every Node.js version

ajv-keywords ships CommonJS only. require("ajv-keywords") works everywhere. import "ajv-keywords" 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.

Latest
5.1.0 (Nov 21, 2021)
Module format
CommonJS
Last CommonJS version
5.1.0
TypeScript types
Bundled
Node engines
not declared
Weekly downloads
61.4M
License
MIT

Does ajv-keywords@5.1.0 actually load? Runtime test results

Installed and executed on Sep 9, 2026 with require("ajv-keywords") from a CommonJS file and import "ajv-keywords" from an ES module.

Runtimerequire("ajv-keywords")import "ajv-keywords"
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 ajv-keywords

ES modules (import)

import ajvKeywords from "ajv-keywords";

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 ajvKeywords = require("ajv-keywords");

Module format by version

Derived from the type, main and exports fields of every stable release on npm (29 versions; the newest 29 shown).

VersionsFormatFirst published
0.1.0 – 5.1.0CommonJSJun 5, 2016

Frequently asked

Is ajv-keywords ESM-only?

ajv-keywords@5.1.0 is a CommonJS package. ajv-keywords ships CommonJS only. require("ajv-keywords") works everywhere. import "ajv-keywords" 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 ajv-keywords with ES module syntax?

Yes. import ajvKeywords from "ajv-keywords" 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 ajv-keywords work in Bun?

Yes. import "ajv-keywords" loaded successfully in Bun 1.4 on Sep 9, 2026.

Does ajv-keywords ship TypeScript types?

Yes. ajv-keywords bundles its own type declarations; no @types package is needed.

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