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JavaScript Basics

ES6+ syntax, scope & closures, prototypes, event-driven asynchronous programming, and DOM manipulation APIs.

1JS Syntax, Variables & Scope Mechanics

var vs let vs const, lexical scope, hoisting, and primitive vs object data types.

JS Syntax, Variables & Scope Mechanics

var vs let vs const, lexical scope, hoisting, and primitive vs object data types.

JS Syntax, Variables & Scope Mechanics

var vs let vs const, lexical scope, hoisting, and primitive vs object data types.

2Functions, Closures & Execution Context Call Stacks

Execution Context lifecycle (Creation vs Execution), Lexical Environments, Scope Chains, `this` binding rules, and lexical closures.

Functions, Closures & Execution Contexts

V8 call stack mechanics, variable environment records, closure heap retention, and dynamic this resolution.

Functions, Closures & Execution Contexts

Master JavaScript execution contexts (Creation vs Execution phases), lexical environment record chains, closure memory mechanics on the V8 heap, and the five rules of `this` binding.

3Objects, Prototypes & Prototypal Inheritance Mechanics

Prototypal delegation, [[Prototype]] internal slots, Object.create, property descriptors, and ES6 class desugaring.

Objects, Prototypes & Prototypal Inheritance

Prototype delegation, the prototype chain traversal algorithm, property descriptors, and V8 hidden class transitions.

Objects, Prototypes & Prototypal Inheritance

Master prototypal delegation, the `[[Prototype]]` internal slot, prototype chain lookup traversal, property attribute descriptors, and ES6 class syntax desugaring.

4Asynchronous JS: Event Loop, Promises & Async/Await

JavaScript concurrency model, Call Stack, Macrotask vs Microtask queues, Promise state machines, and async/await generator desugaring.

Asynchronous JS - Event Loop, Promises & Async/Await

Event loop tick cycle, microtask queue draining, Promise execution invariants, and asynchronous coroutine evaluation.

Asynchronous JS: Event Loop, Promises & Async/Await

Master the JavaScript concurrency model: single-threaded execution, the Event Loop tick sequence, Microtasks (`Promise`, `queueMicrotask`) vs Macrotasks (`setTimeout`), and `async`/`await` state machines.