Tag: JavaScript

Split code into reusable modules with module.exports and require (CommonJS).

Use the built-in fs module to read, write, update, and delete files in Node.js.

Get system information with the os module: platform, memory, CPU, hostname, and uptime.

Use synchronous fs methods for simple scripts, and learn when sync I/O is a bad idea on servers.

Read and write files asynchronously with callbacks so Node.js can keep handling other work.

See how Node.js powers REST APIs, authentication, databases, and server-side business logic.

Install Node.js and npm, then verify versions from the terminal on Windows, macOS, or Linux.

Write and run your first Node.js script with console.log using the node command.

Learn key Node.js ideas: single-threaded event loop, non-blocking I/O, modules, and npm ecosystem.

Understand V8, libuv, the event loop, callback queue, and how Node handles async operations.