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

TypeScript execution environment and REPL for node.js, with source map support

Last verified Sep 9, 2026 against ts-node@10.9.2. JSON

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

ts-node ships CommonJS only. require("ts-node") works everywhere. import "ts-node" 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
10.9.2 (Dec 8, 2023)
Module format
CommonJS
Last CommonJS version
10.9.2
TypeScript types
Bundled
Node engines
not declared
Weekly downloads
42.2M
License
MIT

Does ts-node@10.9.2 actually load? Runtime test results

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

Runtimerequire("ts-node")import "ts-node"
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 ts-node

ES modules (import)

import tsNode from "ts-node";

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 tsNode = require("ts-node");

Module format by version

Derived from the type, main and exports fields of every stable release on npm (127 versions; the newest 60 shown).

VersionsFormatFirst published
4.1.0 – 10.9.2CommonJSDec 23, 2017

Frequently asked

Is ts-node ESM-only?

ts-node@10.9.2 is a CommonJS package. ts-node ships CommonJS only. require("ts-node") works everywhere. import "ts-node" 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-node with ES module syntax?

Yes. import tsNode from "ts-node" 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-node work in Bun?

Yes. import "ts-node" loaded successfully in Bun 1.4 on Sep 9, 2026.

Does ts-node ship TypeScript types?

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

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