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Basics

Introduction

Node.js is a JavaScript runtime for server-side applications enabling scalable web development.

Installation

Node.js installation uses npm and nvm to manage versions for development.

Running Code

Node.js scripts run via node command or REPL with .js files.

Syntax

Node.js syntax leverages JavaScript with async patterns for server-side code.

Variables

Node.js variables use let and const inheriting JavaScript scoping rules.

Data Types

Node.js data types include string number and object with dynamic typing.

Operators

Node.js operators include arithmetic and logical extending JavaScript.

If Else

Node.js if-else statements control flow with async considerations.

Switch

Node.js switch statements handle cases with break for logic flow.

Loops

Node.js loops include for and while with async loop patterns.

Comments

Node.js comments use // and /* */ supporting JSDoc for documentation.

Errors

Node.js errors use try-catch with Error objects for robust handling.

Debugging

Node.js debugging uses console and --inspect with Chrome DevTools.

Best Practices

Node.js best practices include async/await, avoiding sync methods.

Security Basics

Node.js security prevents XSS and sanitizes inputs for safe APIs.

Modules

Node.js modules use require and ES modules with import/export.

Global Objects

Node.js global objects like process and global provide runtime utilities.

Console

Node.js console logs messages with methods like info and error.

Process

Node.js process object manages environment variables and exit codes.

Timers

Node.js timers use setTimeout and setInterval for async scheduling.

Callbacks

Node.js callbacks handle async operations avoiding callback hell.

Promises

Node.js Promises manage async tasks with Promise.all for batches.

Async/Await

Node.js async/await simplifies Promises with error handling.

Event Loop

Node.js event loop manages async tasks with phases like timers.

Async Patterns

Node.js async patterns handle parallel or sequential execution.

Error Handling

Node.js error handling uses try-catch and error-first callbacks.

File System

Node.js file system uses fs module for reading and writing files.

File Reading

Node.js file reading uses fs.readFile with async callbacks.

File Writing

Node.js file writing uses fs.writeFile with error handling.

File Streams

Node.js file streams handle large files with readable/writable streams.

File Paths

Node.js file paths use path module for cross-platform paths.

File Deletion

Node.js file deletion uses fs.unlink with error handling.

HTTP Module

Node.js HTTP module creates servers with http.createServer.

URL Module

Node.js URL module parses URLs with query string handling.

Query Strings

Node.js query strings use querystring module for parsing.

HTTPS Module

Node.js HTTPS module creates secure servers with TLS certificates.

Express

Node.js Express framework simplifies routing and middleware for APIs.

Express Routing

Node.js Express routing defines endpoints with get and post methods.

Express Middleware

Node.js Express middleware processes requests with next() calls.

Express Static Files

Node.js Express static files serve assets with express.static.

Express Error Handling

Node.js Express error handling uses middleware for 404 and 500 errors.

Express APIs

Node.js Express APIs handle JSON requests with typed responses.

Express Authentication

Node.js Express authentication uses JWT or OAuth for secure APIs.

REST APIs

Node.js REST APIs use Express with CRUD endpoints and JSON.

GraphQL APIs

Node.js GraphQL APIs use Apollo Server for typed queries.

WebSockets

Node.js WebSockets use ws module for real-time communication.

HTTP Requests

Node.js HTTP requests use axios or fetch for external APIs.

Form Handling

Node.js form handling uses express.urlencoded for POST data.

File Uploads

Node.js file uploads use multer for multipart/form-data.

JSON Handling

Node.js JSON handling uses JSON.parse for safe serialization.

Environment Variables

Node.js environment variables use dotenv for configuration.

CORS

Node.js CORS enables cross-origin requests with cors middleware.

Rate Limiting

Node.js rate limiting uses express-rate-limit for API protection.

Compression

Node.js compression uses compression middleware for faster responses.

Security Headers

Node.js security headers use helmet for HTTP protection.

MongoDB

Node.js MongoDB integration uses mongoose for schema-based data.

MySQL

Node.js MySQL integration uses mysql2 for relational queries.

PostgreSQL

Node.js PostgreSQL integration uses pg for typed queries.

Redis

Node.js Redis integration uses ioredis for caching and sessions.

Database Connection

Node.js database connection uses connection pools for efficiency.

ORM

Node.js ORMs like Sequelize and TypeORM simplify database queries.

Mongoose

Node.js Mongoose provides MongoDB schemas with typed queries.

Sequelize

Node.js Sequelize supports MySQL and PostgreSQL with typed models.

TypeORM

Node.js TypeORM supports multiple databases with TypeScript integration.

Database Transactions

Node.js database transactions ensure data integrity with commit/rollback.

Buffer

Node.js Buffer handles binary data for streams and files.

Stream

Node.js Stream processes data in chunks for efficient I/O.

Events

Node.js EventEmitter handles custom events with emit and on methods.

Path

Node.js Path module resolves file paths with join and normalize.

OS

Node.js OS module provides system info like cpus and platform.

Util

Node.js Util module offers utilities like promisify for callbacks.

Crypto

Node.js Crypto module handles hashing and encryption for security.

Child Process

Node.js child processes run external commands with spawn.

Cluster

Node.js Cluster module scales apps across CPU cores with workers.

Testing

Node.js testing uses Jest or Mocha for unit and integration tests.

Unit Testing

Node.js unit testing with Jest tests functions with assertions.

Integration Testing

Node.js integration testing validates API endpoints with supertest.

Mocking

Node.js mocking with Jest simulates dependencies for isolated tests.

Debugging Tests

Node.js test debugging uses --inspect with Jest or Mocha.

Performance Testing

Node.js performance testing uses Artillery for load testing APIs.

Logging

Node.js logging uses winston for customizable log levels and formats.

Error Logging

Node.js error logging captures exceptions with winston or pino.

Request Logging

Node.js request logging uses morgan for API request tracking.

Deployment

Node.js deployment uses PM2 and Docker for production environments.

PM2

Node.js PM2 manages processes with clustering and monitoring.

Docker

Node.js Docker containers package apps with multi-stage builds.

Environment Setup

Node.js environment setup uses dotenv for dev and prod configs.

Scalability

Node.js scalability uses clustering and load balancers for high traffic.

REST API

Node.js REST API with Express handles CRUD operations with JSON.

GraphQL API

Node.js GraphQL API with Apollo Server handles typed queries.

Authentication

Node.js authentication with JWT secures API endpoints.

File Upload

Node.js file upload with multer processes multipart/form-data.

Real-Time Chat

Node.js real-time chat uses WebSockets with Socket.IO.

CRUD App

Node.js CRUD app with MongoDB handles create read update delete.

API Testing

Node.js API testing with Jest and supertest validates endpoints.

Logging Setup

Node.js logging setup with winston logs requests and errors.

Dockerized App

Node.js Dockerized app uses Dockerfile for containerized deployment.

Performance Monitor

Node.js performance monitor uses clinic.js for diagnostics.

Node.js Async Code Analyzer

This page provides the Node.js Async Code Analyzer tool. Utilize it for your tasks.

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Node.js Code Commenter

This page provides the Node.js Code Commenter tool. Utilize it for your tasks.

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Node.js Code Formatter

This page provides the Node.js Code Formatter tool. Utilize it for your tasks.

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Node.js Error Explainer

This page provides the Node.js Error Explainer tool. Utilize it for your tasks.

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Node.js JSDoc Generator

This page provides the Node.js JSDoc Generator tool. Utilize it for your tasks.

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Node.js Module Reference

This page provides the Node.js Module Reference tool. Utilize it for your tasks.

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Node.js Package.json Generator

This page provides the Node.js Package.json Generator tool. Utilize it for your tasks.

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Node.js to ESM Converter

This page provides the Node.js to ESM Converter tool. Utilize it for your tasks.

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Welcome to Node Tactics - Your Free Resource to Learn Javascript

Basics

Async

File I/O

HTTP

Express

Web Development

Databases

Core Modules

Testing

Logging

Deployment

Examples

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