Node 18 !!exclusive!! < LATEST · 2024 >

// Good import readFile from 'node:fs/promises';

Node 18 fixed that. By shipping the , it finally aligned the server with the browser.

// Bad (in ESM, this might break with bundlers) import readFile from 'fs';

Node 18 upgraded to OpenSSL 3.0, which introduced stricter security defaults. The most famous casualty? algorithms were deprecated. If you were using legacy auth systems or old database drivers that relied on these, they broke. node 18

: Node 18 updated the V8 JavaScript engine to version 10.1, which includes performance improvements and new language features like the Intl.SupportedValuesOf method. Improvements to the Ecosystem

: The node:test module was introduced, allowing developers to execute unit tests without installing third-party frameworks like Jest or Mocha.

Node.js 18, codenamed was a landmark release that bridged the gap between server-side and browser JavaScript. It transitioned to Long-Term Support (LTS) in October 2022 and remained a foundational runtime for high-performance applications until its scheduled end-of-life on April 30, 2025 . Key Features of Node.js 18 // Good import readFile from 'node:fs/promises'; Node 18

Okay, maybe not death , but a serious challenge. Node 18 introduced an that later became stable in Node 20. For the first time, you could write and run tests without a single devDependency .

This discrepancy gave rise to the concept of "isomorphic" JavaScript—code that could run on both the client and the server. In practice, however, it was a headache of polyfills and conditional imports. Node 18 put an end to this charade by globally enabling the Fetch API by default.

This wasn't just about convenience. It reduced bundle sizes, improved standardization, and made isomorphic JavaScript (code that runs identically on client and server) a true reality. The most famous casualty

: This version added experimental support for the Web Streams API, providing a standard way to handle streaming data across different platforms.

In the fast-paced world of software development, version numbers often blur together. We upgrade, we fix breaking changes, we move on. But occasionally, a release arrives that serves as a distinct demarcation line between "how things used to be" and "how they should be." Node.js 18, released in April 2022, was precisely such a milestone.

As of mid-2024, Node 18 is part of the phase. It is slated for End-of-Life (EOL) in April 2025 . 0.5.1 Organizations still running on Node 18 should begin planning upgrades to Node 20 or Node 22 to ensure continued security updates and performance improvements. 0.5.5 AI responses may include mistakes. Learn more