As of my last update in September 2021, ts-node is a popular TypeScript execution and REPL for Node.js. To check the validity and version of ts-node installed in your project, you can follow these steps:

  1. Check ts-node Version: Open your project's terminal or command prompt and run the following command to check the installed version of ts-node:

    npx ts-node --version

    This will display the version of ts-node currently installed in your project.

  2. Execute TypeScript Files: To test ts-node, you can run a simple TypeScript file. Create a file named test.ts with the following content:

    const message: string = 'Hello, ts-node!'; console.log(message);

    Then, run the following command to execute the TypeScript file using ts-node:

    npx ts-node test.ts

    If ts-node is installed and working correctly, it should execute the TypeScript file and output Hello, ts-node! to the console.

  3. tsconfig.json Configuration: ts-node relies on your project's tsconfig.json file for TypeScript configurations. Ensure that your tsconfig.json is set up correctly for your project's needs.

  4. Update ts-node (Optional): If you find that you are using an older version of ts-node, you can update it to the latest version using npm or yarn:

    npm install ts-node@latest --save-dev
    yarn add ts-node@latest --dev

    Always make sure to back up your project and review the release notes of the new version to see if there are any breaking changes.

By performing these checks, you can ensure that ts-node is installed, functioning correctly, and running the desired TypeScript files as expected. Remember to keep ts-node and other dependencies up to date for the best performance and compatibility with your TypeScript projects.

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