Avoid dynamic require() which may trigger repeated typechecking prefer import.

If you absolutely must typecheck in ts-node:

Enable transpileOnly to skip typechecking without swc.

To skip typechecking in ts-node, do one of the following: In these cases, ts-node can skip typechecking, making it much faster. It is often better to typecheck as part of your tests or linting. The contents of node_modules are ignored by default. When executing TypeScript with npx or yarn dlx, the code resides within a temporary node_modules directory.

If none of the above work, and you must use files, include, or exclude, enable our files option. Require('ts-node').register( from 'lib_greeter' const g = new Greeter ( ) g. Node executes scripts using the new ESM loader Node executes scripts using the classic CommonJS loader

You can choose to either transform to CommonJS or to preserve the native import syntax, using node's native ESM support. TypeScript is almost always written using modern import syntax, but it is also transformed before being executed by the underlying runtime. If you have enabled importHelpers, you must also install CommonJS vs native ECMAScript modules

Compatible with pre-compilation for production.

Integrate with test runners, debuggers, and CLI tools.

Automatic defaults to match your node version.

This is accomplished by hooking node's module loading APIs, enabling it to be used seamlessly alongside other Node.js

It JIT transforms TypeScript into JavaScript, enabling you to directly execute TypeScript on Node.js without precompiling. Ts-node is a TypeScript execution engine and REPL for Node.js. The latest documentation can also be found on our website: Table of Contents TypeScript execution and REPL for node.js, with source map and native ESM support.

Tsnode