No more jest or mocha for basic use cases—Node 18 gives you a full test harness out of the box. Streaming data is critical for performance. Node 18 delivers the full Web Streams API ( ReadableStream , WritableStream , TransformStream ), making it compatible with the standardized web platform.
Run it with: node --test
If you are still on Node 14 or 16, migrate to Node 18 (both have reached end-of-life). If you are starting a new project, Node 18 provides a perfect balance of stability and modernity. node 18 full
Node.js 18 has arrived—and it is a milestone release. Dubbed the “Full” version by many in the development community, Node 18 isn't just another incremental update. It represents a significant shift in how JavaScript developers build server-side applications, offering a complete toolset that merges stability with cutting-edge features. No more jest or mocha for basic use