Node.js

Node.js is a runtime environment that lets JavaScript run outside a browser — most commonly, on a server. This let developers use a single language, JavaScript, across both the frontend and the backend of a web application, something that wasn't previously possible.

Why Node.js Was a Significant Development

• Lets developers use one single language across an entire full-stack application
• Built on an efficient, non-blocking architecture well suited to real-time applications
• Backed by npm, an enormous package ecosystem with pre-built code for nearly any task
• Genuinely fast for building scalable network applications

Common Uses for Node.js

• Real-time applications — chat apps, live notifications, collaborative tools
• API development — building the backend services a frontend application relies on
• Build tools — many modern frontend development tools themselves run on Node.js

Node.js and WordPress

Standard WordPress runs on PHP, not Node.js, though Node.js frequently comes up in more advanced setups — building custom tools around a headless WordPress installation, or running the build process behind a custom-developed WordPress theme's frontend.