JavaScript Concepts

Visual, interactive explanations of core JS concepts.
Understand the "why" before practicing the "how".

🟢FundamentalsCore JS basics

🎈beginner

Hoisting

How JS moves declarations to the top

4 key points8 examples

🟡Core MechanicsHow JS really works

🎒intermediate

Closures

Functions that remember their scope

4 key points6 examples
👆intermediate

The "this" Keyword

Context binding rules

6 key points8 examples
🔗intermediate

Prototypes

JavaScript inheritance mechanism

5 key points8 examples
🔁intermediate

Recursion

Functions that call themselves

5 key points8 examples

🔴AdvancedDeep dive topics

🔄advanced

Event Loop

How async JavaScript works

6 key points8 examples

⚙️Runtime InternalsHow JS engines work

🧠intermediate

Memory Model

Stack vs Heap and garbage collection

5 key points6 examples
🚀advanced

V8 Engine

JIT compilation and optimization

6 key points6 examples

🟢Node.jsServer-side JavaScript

♻️advanced

Node.js Event Loop

Libuv phases and async patterns

6 key points6 examples
🌊intermediate

Streams & Buffers

Efficient data processing

6 key points6 examples

🌐BrowserFrontend rendering

🎨intermediate

Critical Render Path

How browsers render pages

6 key points6 examples
👷advanced

Web Workers

Multi-threading in the browser

6 key points6 examples