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Is ts-interface-checker ESM-only? Can you require() it?

Runtime library to validate data against TypeScript interfaces

Last verified Sep 9, 2026 against ts-interface-checker@1.0.2. Markdown · JSON

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

ts-interface-checker ships CommonJS only. require("ts-interface-checker") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "ts-interface-checker" 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.

What to do

  1. require("ts-interface-checker") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun.
  2. From ES modules use the default import: import tsInterfaceChecker from "ts-interface-checker"; then destructure. Named imports only work when Node.js can statically detect the exports.
  3. TypeScript: types are bundled; install nothing extra.
Latest
1.0.2 (Oct 11, 2021)
Module format
CommonJS
Last CommonJS version
1.0.2
TypeScript types
Bundled
Node engines
not declared
Weekly downloads
31.5M
License
Apache-2.0

Does ts-interface-checker@1.0.2 actually load? Runtime test results

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

Runtimerequire("ts-interface-checker")import "ts-interface-checker"
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 1.4.0✓ works✓ works

How to import ts-interface-checker

ES modules (import)

import tsInterfaceChecker from "ts-interface-checker";

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 tsInterfaceChecker = require("ts-interface-checker");

Module format by version

Derived from the type, main and exports fields of every stable release on npm, corrected where a runtime test of that version contradicted them (19 versions; the newest 19 shown).

VersionsFormatFirst published
0.1.0 – 1.0.2CommonJSJan 11, 2018

Frequently asked

Is ts-interface-checker ESM-only?

ts-interface-checker@1.0.2 is a CommonJS package. ts-interface-checker ships CommonJS only. require("ts-interface-checker") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "ts-interface-checker" 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 ts-interface-checker with ES module syntax?

Yes. import tsInterfaceChecker from "ts-interface-checker" 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 ts-interface-checker work in Bun?

Yes. import "ts-interface-checker" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

Does ts-interface-checker ship TypeScript types?

Yes. ts-interface-checker bundles its own type declarations; no @types package is needed.

Links

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