JS-Gym

1. JavaScript Core Concepts

• Variables, Scoping, & Hoisting
• Closures
• Prototypal Inheritance
• Functions
• Event Handling

2. DOM Manipulation

• Direct DOM Access
• Event Listeners
• Updating the DOM

3. Front-End-Specific Algorithms

• Rendering Algorithms
• Traversal
• String Manipulation

4. Asynchronous Programming & Promises

• Promises, Callbacks, & Async/Wait
• Event Loop & Single-Thread Environment

5. ES6+ Features

• Arrow Functions
• Destructuring (objects and arrays)
• Spread & Rest Operators (...)
• Modules (import/export)
• Template Literals (using backticks for string interpolation)

6. Data Structures & Algorithms in JavaScript

• Arrays (map, reduce, filter, etc.)
• Objects & Maps/Sets
• Recursion
• Big O Notation

7. Testing & Debugging

• Browser Developer Tools
• Unit Tests (Jest & Mocha)

8. Front-End Performance

• Optimize Front-End Performance (lazy loading images, diff HTTP requests, minimizing DOM updates)
• Identify Bottlenecks (excessive reflows/repaints, debouncing/throttling)