[] 1. Fundamentals
[] Variables (var, let, const)
[] Data Types (Primitives: string, number, boolean, null, undefined, symbol, bigint)
[] Operators (arithmetic, comparison, logical, assignment)
[] Type Conversion & Coercion
[] Comments & Basic Syntax
[] 2. Control Flow
[] Conditional Statements (if, else if, else)
[] Switch Statements
[] Ternary Operator
[] Loops (for, while, do...while)
[] Loop Control (break, continue)
[] 3. Functions Basics [] Function Declarations [] Function Expressions [] Parameters & Arguments [] Return Statements [] Basic Scope Understanding
[] 4. Arrays Introduction
[] Creating Arrays
[] Accessing Elements
[] Basic Methods (push, pop, shift, unshift)
[] Array Length
[] Basic Iteration (for loop)
[] 5. Objects Introduction
[] Object Literals
[] Accessing Properties (dot vs bracket notation)
[] Adding/Modifying Properties
[] Methods in Objects
[] this keyword (basic understanding)
[] 6. Strings & Numbers
[] String Methods (length, toUpperCase, toLowerCase, slice, indexOf)
[] Number Methods (toFixed, parseInt, parseFloat)
[] Template Literals (basic)
[] 7. DOM Basics
[] Selecting Elements (getElementById, querySelector)
[] Manipulating Content (textContent, innerHTML)
[] Manipulating Styles & Classes
[] Basic Events (click, mouseover, submit)
[] addEventListener Basics
[] 8. Console & Debugging
[] console.log(), console.error()
[] Basic Browser DevTools Usage
[] Debugging Simple Errors
[] 1. Advanced Functions [] Arrow Functions [] Higher-Order Functions [] Callbacks [] Closures [] IIFE (Immediately Invoked Function Expressions) [] Recursion
[] 2. ES6+ Features [] Template Literals (advanced) [] Destructuring (arrays & objects) [] Spread & Rest Operators [] Default Parameters [] Enhanced Object Literals
[] 3. Array Methods Mastery
[] map(), filter(), reduce()
[] find(), findIndex()
[] some(), every()
[] sort(), reverse()
[] slice(), splice()
[] Chaining Methods
[] 4. Object Methods
[] Object.keys(), Object.values(), Object.entries()
[] Object.assign(), Object.freeze(), Object.seal()
[] Property Descriptors
[] Getters & Setters
[] 5. Classes & OOP
[] Constructor Functions
[] Prototypes & Prototype Chain
[] ES6 Classes
[] Inheritance (extends)
[] super keyword
[] Static Methods
[] 6. Asynchronous JavaScript
[] Callback Hell Problem
[] Promises (creation & consumption)
[] async/await Syntax
[] Error Handling in Promises
[] Basic Fetch API Usage
[] 7. Error Handling
[] try...catch...finally
[] Custom Error Objects
[] Error Propagation in Async Code
[] 8. Regular Expressions
[] Creating Patterns
[] Common Methods (test(), exec())
[] String Methods with Regex (match(), replace())
[] Common Patterns (email, phone, etc.)
[] 9. Advanced DOM [] Event Bubbling & Capturing [] Event Delegation [] Creating/Removing Elements [] Dataset Attributes [] Form Validation
[] 10. Storage
[] Cookies
[] localStorage & sessionStorage
[] JSON (JSON.stringify(), JSON.parse())
[] 11. Modules
[] ES6 Modules (import/export)
[] Named vs Default Exports
[] 1. Advanced OOP & Patterns [] Factory Functions [] Module Pattern [] Revealing Module Pattern [] Singleton Pattern [] Observer Pattern [] Composition vs Inheritance
[] 2. Functional Programming [] Pure Functions [] Immutability [] Currying & Partial Application [] Function Composition [] Higher-Order Functions (advanced) [] Functors & Monads (basic)
[] 3. Advanced Asynchronous Patterns
[] Promise Combinators (Promise.all, Promise.race, Promise.allSettled, Promise.any)
[] Async Iterators & Generators
[] AbortController for Fetch
[] Web APIs Integration
[] 4. Memory & Performance [] Garbage Collection [] Memory Leaks Identification [] Debouncing & Throttling [] Lazy Loading [] Performance Monitoring
[] 5. Advanced Array/Object Operations [] Deep Copy vs Shallow Copy [] Immutable Updates [] Advanced Reduce Patterns [] Map & Set Data Structures [] WeakMap & WeakSet
[] 6. Metaprogramming [] Symbols [] Iterators & Generators [] Proxies [] Reflect API [] Property Descriptors (advanced)
[] 7. Advanced Error Handling [] Error Boundaries (concept) [] Global Error Handling [] Async Error Strategies [] Monitoring & Logging
[] 8. Tooling & Workflow [] Bundlers (Webpack basics) [] Transpilers (Babel) [] Linters (ESLint) [] Formatters (Prettier) [] Package Management (npm/yarn)
[] 9. Testing [] Unit Testing (Jest basics) [] Mocking [] Test Driven Development (TDD basics)
[] 1. JavaScript Engine Internals [] Event Loop Deep Dive [] Microtasks vs Macrotasks [] Call Stack & Memory Heap [] V8 Optimization Strategies [] Just-In-Time Compilation [] Hidden Classes & Inline Caching
[] 2. Performance Optimization Expert [] Critical Rendering Path Optimization [] Code Splitting Strategies [] Tree Shaking [] Bundle Analysis [] Web Workers for CPU-intensive Tasks [] Service Workers for Caching
[] 3. Advanced Patterns & Architecture [] Middleware Pattern [] Pub/Sub Pattern Implementation [] State Machines [] Dependency Injection [] Advanced Design Patterns (Adapter, Decorator, Strategy)
[] 4. Type Systems [] TypeScript Advanced Types [] Generic Programming [] Conditional Types [] Type Guards & Type Assertions [] Declaration Files (.d.ts)
[] 5. Security [] XSS Prevention Strategies [] CSRF Protection [] Content Security Policy Implementation [] Secure Coding Practices [] OWASP Top 10 for JavaScript
[] 6. Testing Mastery [] Integration Testing [] E2E Testing (Cypress/Playwright) [] Performance Testing [] Load Testing [] Visual Regression Testing [] Test Automation Strategies
[] 7. Build Systems & Tooling Expert [] Advanced Webpack Configuration [] Custom Loaders & Plugins [] Babel Plugin Development [] Custom ESLint Rules [] CI/CD Pipeline Configuration [] Docker for JavaScript Apps
[] 8. Framework Internals [] Virtual DOM Implementations [] Reactive Programming (RxJS deep dive) [] State Management Libraries (Redux/MobX internals) [] Custom Renderers [] Compiler-based Frameworks (Svelte internals)
[] 9. Advanced APIs & Protocols [] WebSockets (Socket.io advanced) [] WebRTC Implementation [] GraphQL (Client & Server) [] WebAssembly Integration [] Progressive Web Apps (Advanced)
[] 10. Server-Side JavaScript Mastery [] Node.js Event Loop Differences [] Streams (Advanced Usage) [] Cluster Module & PM2 [] Advanced Error Handling Patterns [] Performance Monitoring & Profiling [] Memory Leak Detection in Node.js
[] 11. Cross-Platform Development [] React Native Architecture [] Electron Internals [] Capacitor/Cordova Advanced [] Desktop App Optimization
[] 12. Advanced Data Structures & Algorithms [] Implementing Custom Data Structures [] Algorithm Optimization for V8 [] Memory-efficient Algorithms [] Concurrent Data Structures
[] 13. DevOps for JavaScript [] Infrastructure as Code (Terraform) [] Kubernetes for JavaScript Apps [] Monitoring & Alerting (Prometheus, Grafana) [] Log Management (ELK Stack)
[] 14. Code Quality & Architecture [] Clean Architecture [] Domain-Driven Design [] Hexagonal Architecture [] Microfrontends Architecture [] Monorepo Management (Lerna, Nx)
[] 15. Research & Innovation [] JavaScript Proposals (TC39 Process) [] Contributing to Open Source [] Creating Libraries/Frameworks [] Performance Research [] Browser Compatibility Strategies
[] Frontend Frameworks Specialization [] React: Hooks Advanced, Concurrent Features, Server Components [] Vue: Composition API Advanced, Plugin Development [] Angular: RxJS Integration, Advanced DI, AOT Compilation
[] Backend/Node.js Specialization [] Microservices Architecture [] API Design (REST, GraphQL, gRPC) [] Database Optimization [] Message Queues & Event-Driven Architecture
[] Mobile Development [] React Native: Native Modules, Performance Optimization [] Flutter/Dart Integration [] Mobile App Architecture
[] Game Development [] Canvas API Mastery [] WebGL/Three.js [] Physics Engines [] Game Architecture Patterns
[] Data Visualization [] D3.js Mastery [] WebGL for Visualization [] Real-time Data Streaming [] Custom Chart Libraries
[] Machine Learning/AI [] TensorFlow.js [] ML Models in Browser [] Natural Language Processing [] Computer Vision with JavaScript