The runtime that lets JavaScript run outside the browser, powering development tools and servers.
Think of Node.js like shipping JavaScript beyond its original home in web browsers. Just as a browser is a container that runs JavaScript code, Node.js is a different runtime that lets you run JavaScript on servers and your computer.
Node.js powers the entire JavaScript development ecosystem: npm (package management), build tools, development servers, and backend applications. When you run npm install or start a dev server, Node.js is doing the work behind the scenes.
Node.js comes with its own CLI tools and a rich ecosystem of packages. Claude Code, Supabase Edge Functions (via Deno, a Node.js alternative), and most modern frameworks rely on Node.js for development tooling.
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