While experimental in previous versions, Node 18 moved the Web Streams API to the global scope. This allows for a standardized way of handling streaming data across different JavaScript environments (Node, Deno, and Browsers). 5. Prefix-Only Core Modules
As of May 2026, It has been superseded by Node 20 and Node 22 (LTS).
import fs from 'node:fs'; instead of import fs from 'fs'; .This makes it explicitly clear that the module is a built-in part of the runtime. 6. OpenSSL 3.0 Support node 18 full
If you are currently running a "Node 18 full" stack, it is highly recommended to . You will keep all the features mentioned above—like native fetch and the test runner—while gaining significant performance boosts and the latest security patches. AI responses may include mistakes. Learn more
Perhaps the most anticipated feature in Node 18 was the addition of a browser-compatible fetch() implementation. While experimental in previous versions, Node 18 moved
It allows you to create subtests, skip tests, and use "describe/it" syntax without installing Jest or Mocha.
Node.js 18 introduced the node:test module, a move toward reducing dependency fatigue. Prefix-Only Core Modules As of May 2026, It
To prevent confusion between core Node.js modules and community packages on npm, Node 18 encouraged (and in some cases required) the use of the node: prefix.
Before Node 18, developers had to rely on third-party libraries like node-fetch or axios .
Here is a full look at the features that defined Node.js 18. 1. Native Fetch API