Non-Blocking I/O
•V8 Engine
•Event-Driven
Event Loop & Async
Understanding Node.js non-blocking I/O model and the event-driven architecture that powers high-performance applications.
Call StackCallback QueueMicrotasksprocess.nextTicksetImmediate
Modules System
Deep dive into CommonJS and ES Modules, understanding require vs import and module caching mechanisms.
CommonJSES ModulesModule CachingCircular Dependenciespackage.json
Streams & Buffers
Efficient handling of large data with streams for reading, writing, and transforming data incrementally.
Readable StreamsWritable StreamsTransformPipingBuffer API
File System (fs)
Working with files and directories using synchronous and asynchronous file operations.
fs.readFilefs.writeFilefs PromisesPath ModuleFile Watchers
Process & Memory
Managing Node.js processes, understanding memory management, garbage collection, and cluster mode.
process.envChild ProcessesCluster ModuleWorker ThreadsMemory Leaks
NPM & Package Management
Mastering the Node Package Manager, semantic versioning, and dependency management best practices.
package.jsonSemantic Versioningnpm scriptsLock FilesPublishing
Quick Example
const http = require('http');
const server = http.createServer((req, res) => {
res.writeHead(200, { 'Content-Type': 'application/json' });
res.end(JSON.stringify({ message: 'Hello from Node.js!' }));
});
server.listen(3000, () => {
console.log('🚀 Server running on http://localhost:3000');
});