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Node.js v20 introduces a permissions model for enhanced security, a stable native test runner, and updates to V8 with new string and array methods. It also adds tail call optimization to improve recursive functions in Web Assembly.

What's new in Node.js v20?

Node.js

Node.js now has an experimental feature called the Permission Model. It allows developers to restrict access to specific resources during program execution, such as file system operations, child process spawning, and worker thread creation. By using this feature, developers can prevent their applications from accessing or modifying sensitive data or running potentially harmful code.

Node v20.0.0 (Current)

V8 is an open-source JavaScript engine developed by Google for executing JavaScript code in web browsers and server-side environments. It is known for its high-performance, efficient memory management, and support for modern JavaScript features and optimizations. Readers can explore V8's architecture, optimizations, and performance characteristics, understanding how JavaScript engines work and how to optimize JavaScript code for better performance and compatibility across different platforms and environments.

Best of V8 — April 2023