| Introduction |
History of JS, ES versions, JS vs Java |
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| Basics & Syntax |
Variables (var/let/const), Data types, Operators |
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| Control Flow |
if/else, switch, loops (for, while, do-while) |
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| Functions |
Function declaration, Expression, Arrow functions |
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| Scope & Hoisting |
Global vs Local scope, Hoisting behavior |
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| Objects |
Object literals, Properties, Methods, this keyword |
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| Arrays |
Array methods (map, filter, reduce), Iteration |
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| Strings |
String methods, Template literals |
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| DOM Manipulation |
getElementById, querySelector, Events |
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| Events |
Event bubbling, Event delegation, addEventListener |
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| Error Handling |
try/catch, throw, Error objects |
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| Asynchronous JS |
Callbacks, Promises, async/await |
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| Timers |
setTimeout, setInterval, requestAnimationFrame |
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| Prototypes & OOP |
Prototype chain, Classes, Inheritance |
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| Closures |
Lexical scope, Private variables |
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| Modules |
ES Modules (import/export), CommonJS, AMD |
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| Regular Expressions |
Patterns, Flags, Validation use cases |
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| Advanced Functions |
Higher-order functions, Currying, Memoization |
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| Event Loop |
Call stack, Microtasks, Macrotasks, Job queue |
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| Async Patterns |
Promise.all, Promise.race, Observables |
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| Error Handling (Advanced) |
Custom errors, Global error handling, try...finally |
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| Web APIs |
Fetch API, LocalStorage/SessionStorage, Geolocation |
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| ES6+ Features |
Destructuring, Spread/rest, Optional chaining |
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| Functional Programming |
Immutability, Pure functions, Composition |
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| Performance Optimization |
Debouncing, Throttling, Lazy loading |
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| Security in JS |
XSS prevention, CSP, Sanitization |
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| Testing in JS |
Unit testing (Jest, Mocha), Mocks, Spies |
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| Build Tools |
Webpack, Babel, ESLint, Prettier |
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| Runtime & Engines |
V8, SpiderMonkey, JIT Compilation |
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| Design Patterns |
Singleton, Factory, Observer, Module Pattern |
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| Advanced Memory Mgmt |
Garbage collection, WeakMap/WeakSet, Leaks |
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| Meta-programming |
Proxy, Reflect, Symbols |
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| Concurrency & Workers |
Web Workers, Service Workers, Shared Workers |
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| Expert Level Concepts |
AST, JS engines internals, Event loop internals, Polyfills |
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