javascript.md

JavaScript Learning Roadmap

1. Basics

• Primitive: string, number, boolean, null, undefined, symbol, bigint
• Reference: object, array, function
• Nullish Coalescing (??), Optional Chaining (?.)
• Implicit vs Explicit Type Conversion

2. Functions

• Closures
• Immediately Invoked Function Expressions (IIFE)
• Higher Order Functions (HOF)
• Immutability
• Composition

3. DOM Manipulation

• Event Bubbling & Capturing
• Delegation

4. OOP in JavaScript

• Constructor Functions
• Prototypes
• class keyword
• Class Properties & Methods
• extends & inheritance
• Static methods
• Access Modifiers (public, private, protected)
• Abstract Classes
• Encapsulation (#private, closures)
• implements keyword (interface + class)

5. Advanced Concepts

• Hoisting
• Scope (Global, Function, Block)
• Lexical Scope
• Execution Context
• Call Stack
• Event Loop
• Web APIs & Task Queue, Microtasks
• Strict Mode ("use strict")
• Prototypes & Inheritance

6. Advanced Data Structures

• Sets & WeakSets
• Maps & WeakMaps
• Iterators & Generators
• Symbols

7. Asynchronous JavaScript Deep Dive

• Callbacks vs Promises vs async/await
• Promise.all, Promise.race, Promise.any, Promise.allSettled

8. Browser & Web APIs

• LocalStorage, SessionStorage, Cookies
• Geolocation API
• Fetch & AbortController
• Service Workers & Caching

9. Tooling & Ecosystem

• Bundlers: Webpack, Vite, Parcell
• Transpilers: Babel
• Debugging with console & breakpoints

10. Testing

• DOM Testing with Testing Library
• End-to-End Testing (Cypress, Playwright)