01
JavaScript Fundamentals
// ...Core language recap
Variables & scopeFunctionsObjects & arrays
UNITS
12 LESSONS
02
DOM Selection & Manipulation
// ...Querying and modifying the DOM
Query selectorsCreating elementsModifying content
03
Event Handling
// ...Events and delegation
Event listenersEvent bubblingDelegation patterns
04
Fetch API Basics
// ...HTTP requests in JS
GET/POST requestsHeadersResponse handling
05
Promises Deep Dive
// ...Async fundamentals
Promise statesChainingError handling
06
Async/Await Patterns
// ...Modern async syntax
Async functionsSequential vs parallelError handling
07
Error Handling Strategies
// ...Robust error management
Try/catchError typesUser feedback
08
ES Modules
// ...Module system and bundling
Import/exportModule patternsBundler basics
09
TypeScript: Types & Interfaces
// ...Type-safe code
Basic typesInterfacesType aliases
10
TypeScript: Generics
// ...Reusable typed code
Generic functionsGeneric typesConstraints
11
TypeScript: Type Narrowing
// ...Type guards and narrowing
Type guardsDiscriminated unionsExhaustive checks
12
TypeScript: Utility Types
// ...Built-in type helpers
Partial, Required, PickOmit, RecordReturnType, Parameters
PROJECTS
2 BUILDS
Vanilla Task Manager
8hCRUD app with localStorage
DOMEventsStorage
REQUIREMENTS
- Add/edit/delete tasks
- Filter by status
- Persist to localStorage
TS API Explorer
6hTyped fetch with UI states
TypeScriptFetchUI States
REQUIREMENTS
- Type-safe API calls
- Loading/error states
- Search functionality
INTERACTIVE
3 TOOLS
Promise Visualizer
Step-through promise resolution
15 minDOM Playground
Real-time DOM manipulation sandbox
20 minType Checker
Interactive TypeScript inference
15 min