Node.js 24: Explicit Resource Management Demo

This repository accompanies my YouTube video on the new Explicit Resource Management feature in Node.js 24, which introduces the using and await using keywords for automatic resource cleanup.

📺 Watch the video: Node.js 24: Explicit Resource Management Explained

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🚀 What is Explicit Resource Management?

Node.js 24 (and newer) supports the new using and await using keywords, allowing you to automatically clean up resources (like files, servers, and streams) when they go out of scope. This is similar to features in languages like C# and Rust, and helps prevent resource leaks and boilerplate cleanup code.

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🛠️ Getting Started

1. Install Node.js 24

   • This feature requires Node.js v24 or newer.
   • If you use nvm:

     nvm install 24
     nvm use 24

2. Run the examples

   • Each file is a standalone example. Run them with:

     node <filename>

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📁 Repository Files Explained

• 01-feat.js

  • Demonstrates the basics of both synchronous and asynchronous resource disposal using Symbol.dispose and Symbol.asyncDispose. Shows the syntax for both using and await using keywords.

• 02-custom-stream-logger.js

  • Creates a custom Logger class that writes to a file stream and implements Symbol.asyncDispose. When the logger goes out of scope, it automatically closes the stream and renames the log file with the current timestamp.

• 03-interval.js

  • Shows how to use using with setInterval. When the block ends, the interval is automatically cleared, preventing memory leaks and ongoing timer execution.

• 04-readline.js

  • Demonstrates using await using with Node.js's readline interface. The readline interface is automatically closed after use, without needing an explicit rl.close() call.

• 05-child-process.js

  • Shows how to use await using with a child process spawned by Node.js. The child process is managed as a disposable resource, and its stdout is read using the new toArray() method from asyncIterators helpers.

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📝 About This Repo

This code is for educational purposes and accompanies my YouTube video. Feel free to fork, experiment, and share!

If you have questions or suggestions, leave a comment on the video or open an issue.

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Happy coding! 🎉

License

• Check it here MIT