An interactive, comprehensive reference for JavaScript and TypeScript developers. This repository contains examples, best practices, and code snippets for all major concepts.

• 01. Basics - Variables, Data Types, Operators
• 02. Functions - Functions, Arrow Functions, IIFE, Closures
• 03. Scope & Context - Scope, Context, this keyword

• 04. Array Methods - Map, Filter, Reduce, Sort, Find, Every, Some
• 05. Advanced Array Operations - Complex Sorting, Filtering, Statistics
• 06. Data Analysis - Mean, Median, Mode, Variance, Standard Deviation, Percentile
• 07. Grouping & Aggregation - GroupBy, CountBy, SumBy, Aggregate Functions
• 08. Set Operations - Intersection, Union, Difference, Symmetric Difference

• 09. Object Fundamentals - Creating, Accessing, Methods
• 10. Object Manipulation - Object.keys, Object.values, Object.entries, Destructuring
• 11. Object Patterns - Prototypes, Getters, Setters, Property Descriptors

• 12. JSON Basics - Parse, Stringify, Deep Clone
• 13. JSON Advanced - Schema Validation, CSV Conversion, XML Conversion
• 14. JSON Best Practices - Error Handling, Date Handling, Custom Serialization

• 07. Callbacks & Promises - Callbacks, Promises, Chaining
• 08. Async/Await - Modern Async Patterns
• 09. Event Loop - Understanding JavaScript Runtime

• 10. DOM Manipulation - Selectors, Events, Manipulation, Window API
• 11. Fetch API - HTTP Methods, Request/Response, Timeouts, Retry Logic
• 12. Debugging - Console Methods, Breakpoints, DevTools, Performance Profiling

• 15. Data Structures - Stack, Queue, LinkedList, Tree, Graph
• 16. Sorting Algorithms - Bubble, Quick, Merge Sort
• 17. Search Algorithms - Binary Search, BFS, DFS

• 18. LeetCode-Style Problems - Array Problems, String Manipulation
• 19. Algorithm Challenges - Two Pointers, Sliding Window, Dynamic Programming
• 20. Problem-Solving Patterns - Common Patterns, Solutions, Time Complexity

• 21. TypeScript Basics - Types, Interfaces, Type Aliases
• 22. Advanced Types - Generics, Utility Types, Decorators
• 23. TypeScript Config - tsconfig.json, Compiler Options

• 24. React Basics - Components, Hooks, memo, forwardRef, lazy, Suspense, Portals, Advanced APIs
• 25. React with TypeScript - Typing Components, Props, Hooks, Events
• 26. React Server Components - RSC, Server Actions, Streaming

• 27. Node.js - Node.js Basics, Modules, File System
• 28. Express - REST APIs, Middleware, Auth, Validation, Pagination, File Upload, Swagger
• 29. Databases - SQL, MongoDB, ORMs (Sequelize, Mongoose)

• 30. Security - XSS, CSRF, Authentication, JWT
• 31. Error Handling - Try/Catch, Error Boundaries
• 32. Best Practices - Clean Code, Patterns

• 33. Testing - Jest, Mocha, Testing Library
• 34. Debugging - Chrome DevTools, VSCode Debugger
• 35. Performance - Profiling, Optimization

• 36. Package Managers - npm, yarn, pnpm
• 37. Build Tools - Webpack, Vite, Rollup
• 38. Popular Libraries - Lodash, Axios, Moment, etc.

• 39. Math Operations - Math Object, Calculations, Formatting
• 40. Date & Time - Date Object, Moment.js, Day.js

• 41. Modules - ES6 Modules, CommonJS, Dynamic Imports
• 42. Classes & OOP - Classes, Inheritance, Polymorphism
• 43. Functional Programming - Pure Functions, Immutability

• 44. Web Applications - SPA, PWA, SSR
• 45. Desktop Applications - Electron, Tauri

Each section includes:

• ✅ Complete code examples
• ✅ Runnable snippets
• ✅ Real-world use cases
• ✅ Common pitfalls & solutions
• ✅ Best practices

# Clone the repository git clone <repository-url> # Navigate to examples cd Snippets # Install dependencies (for running examples) npm install # Run interactive examples npm run examples

1. Navigate to the topic you need
2. Read the explanations and examples
3. Copy code snippets into your project
4. Experiment with the interactive examples

Contributions are welcome! Feel free to submit pull requests or open issues.

MIT License - Feel free to use this cheatsheet for learning and reference.

Made with ❤️ for JavaScript & TypeScript developers