The runtime engine was updated to V8 10.1 (from V8 9.5 in Node.js 17), unlocking performance optimizations and new JavaScript methods. Performance and Language Enhancements
It supports subtests, concurrent testing, and outputs results in the TAP (Test Anything Protocol) format.
When developers search for , they are typically looking for one of three things:
It is built on undici , a high-performance HTTP/1.1 client for Node.js. 2. Built-in Test Runner node 18 full
Using a node version manager is the safest way to upgrade without disrupting your system. Option 1: Using NVM (Mac/Linux) nvm install 18 nvm use 18 nvm alias default 18 Use code with caution. Option 2: Using NVM-Windows powershell nvm install 18.20.0 nvm use 18.20.0 Use code with caution.
// Example in an ESM file import db from './db.js'; const user = await db.users.find(1); // No async wrapper needed console.log(user); Use code with caution. 4. Performance Enhancements
This article provides a full, in-depth look at Node.js 18, covering its major features, performance enhancements, and essential migration tips. 1. What's New in Node.js 18? The runtime engine was updated to V8 10
To understand , you must first understand its lifecycle. Unlike many software projects, Node.js follows a predictable release schedule managed by the Node.js Release Working Group.
Enabled adoption of the Fetch API and modern ES modules. Deprecation Notice (2025)
import test, describe from 'node:test'; import assert from 'node:assert'; Option 2: Using NVM-Windows powershell nvm install 18
Node 18 wasn't just another version; it was a "full" modernization effort that standardized how Node.js interacted with the web ecosystem. Its introduction of native fetch, web streams, and built-in testing helped streamline backend development, setting the stage for the enhanced performance found in Node 20 and 22.
She had time. She had nothing but time, night after night, watching machines sleep and wake. She replied: "Yes."
She dug deeper, mapping the coordinates to a town two states over. The files hinted at a blackout that had been more than electrical: schools closed, towns evacuated, a rumor of sensors that had begun to watch human motion as trespassing. The official records called it a "grid consolidation event," sterile and evasive; the voices called it an erasure.
Node 18 introduces a under the node:test module. It includes:
For developers working with native addons, v18.20.0 brought an experimental feature to better manage garbage collection (GC) by segregating finalizers that affect GC state. It also introduced the node_api_nogc_env API to help native module authors write safer and more efficient code by providing a const version of the environment that guarantees no GC interaction in certain contexts, leading to better memory management and predictability for performance-critical applications.