JavaScript

JavaScript

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Last Update	09/13/2026
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Section 1: Getting Started

6Lessons ·
- 2: Setting Up a Development Environment
  
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- 6: How JavaScript Engines Work: V8 Overview
  
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Section 2: Core Syntax and Types

10Lessons ·
- 7: Variables: var, let, and const
  
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- 9: Type Coercion Rules
  
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- 10: Strict Equality vs Loose Equality
  
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- 11: Operators and Expressions
  
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- 12: Operator Precedence
  
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- 13: Template Literals
  
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- 14: Tagged Templates
  
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- 15: typeof and instanceof
  
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Section 3: Strings and Numbers in Depth

6Lessons ·
- 17: String Methods: slice, substring, split
  
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Section 4: Control Flow

5Lessons ·
- 24: Loops: for, while, for...of, for...in
  
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Section 5: Functions

11Lessons ·
- 28: Function Declarations vs Expressions
  
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- 29: Arrow Functions
  
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- 30: Default and Rest Parameters
  
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- 31: Closures Explained
  
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- 32: The this Keyword in Depth
  
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- 33: call, apply, and bind
  
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- 35: Recursion in JavaScript
  
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- 36: Higher-Order Functions
  
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Section 6: Objects and Arrays

12Lessons ·
- 39: Object Literals and Property Access
  
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- 42: Spread and Rest Syntax
  
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- 43: Array Methods: map, filter, reduce
  
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- 44: Array Methods: find, some, every
  
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- 49: Structured Clone and Deep Copying
  
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Section 7: Maps, Sets, and Symbols

4Lessons ·
- 51: The Map Object
  
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- 52: The Set Object
  
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- 53: WeakMap and WeakSet
  
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Section 8: Asynchronous JavaScript

13Lessons ·
- 57: Microtasks vs Macrotasks
  
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- 59: Promises in Depth
  
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- 62: Async/Await
  
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- 66: Async Iterators and for-await-of
  
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Section 9: Object-Oriented and Prototypes

9Lessons ·
- 68: Prototypal Inheritance Explained
  
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- 70: Constructor Functions
  
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- 71: ES6 Classes
  
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- 72: Static and Private Class Members
  
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- 74: Mixins and Composition
  
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- 75: Class Inheritance with extends and super
  
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Section 12: Modern JavaScript (ES2015-ES2025)

10Lessons ·
- 99: Let, Const, and Block Scoping Revisited
  
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- 101: Modules: import and export
  
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- 102: Dynamic Imports
  
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- 103: Top-Level Await
  
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- 104: Numeric Separators and BigInt
  
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- 105: Array and Object New Methods by Version
  
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- 108: Generators and Iterators in JavaScript
  
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Section 13: Functional Programming Patterns

6Lessons ·
- 109: Pure Functions and Immutability
  
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- 110: Function Composition
  
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- 112: Memoization Techniques
  
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- 113: Declarative vs Imperative Style
  
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Section 14: Error Handling and Debugging

6Lessons ·
- 117: Debugging with Breakpoints and Watch Expressions
  
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- 118: Common JavaScript Pitfalls and Gotchas
  
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- 119: Defensive Programming Techniques
  
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Section 18: Performance

7Lessons ·
- 137: Memory Leaks and How to Avoid Them
  
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- 139: Optimizing Loops and Large Data Processing
  
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Section 20: Regular Expressions

6Lessons ·
- 151: Groups, Flags, and Global Matching
  
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- 152: Lookahead and Lookbehind in JS Regex
  
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- 153: Using Regex with String Methods
  
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- 154: Common Regex Patterns for Validation
  
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Section 21: Design Patterns in JavaScript

7Lessons ·
- 157: The Singleton Pattern
  
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Section 23: Data Structures and Algorithms in JavaScript

12Lessons ·
- 169: Implementing a Doubly Linked List
  
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- 170: Implementing a Stack and Queue
  
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- 171: Implementing a Binary Search Tree
  
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- 177: Implementing Binary Search
  
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Section 24: Practical Projects

14Lessons ·
- 181: Building a Simple Quiz Application
  
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- 184: Building a Simple Drag-and-Drop Interface
  
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- 185: Building a Countdown Timer App
  
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- 193: Building a Real-Time Clock and Alarm App
  
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Section 25: More Advanced Async Patterns

5Lessons ·
- 197: Async Generators for Streaming Data
  
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- 198: Practice Exercise: Building a Simple Task Queue with Concurrency Limits
  
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Section 26: More Object and Class Practice

4Lessons ·
- 201: Practice Exercise: Implementing a Simple Event Emitter Class
  
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- 202: Practice Exercise: Building a Simple State Machine
  
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Section 27: Working with Dates and Internationalization

4Lessons ·
- 203: The Date Object in Depth
  
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Section 30: Build Tooling for Vanilla JavaScript

5Lessons ·
- 216: Understanding Babel and Transpilation
  
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Section 32: Interview and Algorithm Practice

8Lessons ·
- 228: Implementing a Debounce and Throttle from Scratch
  
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- 233: Whiteboard Practice: Two-Pointer Techniques
  
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Section 33: Error Objects (MDN Reference)

4Lessons ·
- 236: Creating Custom Error Subclasses
  
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- 237: AggregateError for Multiple Errors
  
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- 238: Error.cause for Error Chaining
  
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Section 34: TypedArrays and Binary Data

4Lessons ·
- 239: Introduction to TypedArrays
  
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- 240: Int8Array, Uint8Array, and Friends
  
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Section 35: Reflection and Metaprogramming (MDN Reference)

3Lessons ·
- 243: The Reflect Object
  
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Section 36: More Global Functions (MDN Reference)

5Lessons ·
- 246: encodeURIComponent and decodeURIComponent
  
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- 247: parseInt and parseFloat Edge Cases
  
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- 248: isNaN vs Number.isNaN
  
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