Node.js Introduction
Node.js Introduction
Section titled “Node.js Introduction”Node.js is a JavaScript runtime built on the V8 engine. Its main value is that it allows JavaScript to run outside the browser, which makes it useful for web servers, APIs, CLIs, build tools, automation, and real-time backend systems.
Why Node.js Matters
Section titled “Why Node.js Matters”Node.js changed how teams build backend platforms because the same language can now be used on both the frontend and the backend. That reduces context switching and makes full-stack workflows more consistent.
What Makes Node.js Distinct
Section titled “What Makes Node.js Distinct”- non-blocking I/O for handling many concurrent operations efficiently
- an event-driven runtime model
- a large package ecosystem through npm
- strong fit for APIs, streaming workloads, and developer tooling
Node.js is not automatically the best choice for every workload, but it is a strong fit when applications spend most of their time waiting on network or file operations.
Common Use Cases
Section titled “Common Use Cases”- REST APIs and backend-for-frontend services
- real-time systems using websockets or streaming
- command-line tools and project automation
- build systems, code generation, and developer workflows
Core Concepts To Learn First
Section titled “Core Concepts To Learn First”- the event loop and asynchronous I/O
- CommonJS and ES module loading
- npm project structure and dependencies
- HTTP servers and routing
- environment variables and configuration
- process management and production runtime concerns
Where To Go Next
Section titled “Where To Go Next”- Read Node.js Overview for the section map.
- Use Features for the core concept index.
- Start with Event Loop and Async I/O.
- Continue with npm and Packages and HTTP and Express.