TypeScript

Full TypeScript course — 39 topics from the basics to advanced use.

Lessons

• JavaScript Foundations for TypeScript and React
• What Is TypeScript and How Do You Use It?
• TypeScript's Built-in Types: A Complete Reference
• Type Inference, Widening, Narrowing, and satisfies
• Typing Arrays and Tuples
• Object Types: Literals, Optional/Readonly Properties, and Index Signatures
• Type Aliases: Naming Unions, Intersections, Functions, and Generics
• Interfaces: Methods, Extension, Declaration Merging, and Choosing Interface vs Type
• Union and Intersection Types: Combining, Narrowing, and Domain Modeling
• Literal Types: Exact Values, Widening, and `as const`
• Enums: Numeric, String, and Const
• Typing Functions: Parameters, Returns, and Overloads
• Type Narrowing and Control-Flow Analysis
• Type Assertions: as, Non-Null (!), and Their Risks
• Generics: Functions, Types, Interfaces, and Classes
• Reading Types From Values: keyof, typeof, and Indexed Access
• Conditional Types: Branching Logic at the Type Level
• Mapped Types: Transforming Every Property at Once
• Template Literal Types and String Manipulation
• Utility Types: Shaping Objects (Part 1)
• Utility Types: Functions and Advanced Utilities (Part 2)
• Discriminated Unions: Tagged State and Exhaustiveness
• Type System Design: Structural Typing, Variance, and Branding
• Advanced Type Manipulation: Core Techniques (Part 1)
• Advanced Type Manipulation: Recursive and Branded Types (Part 2)
• Classes in Depth: Members, Modifiers, Statics, Abstracts, and Decorators
• Object-Oriented Design in TypeScript: Principles and Practice
• ES Modules: Imports, Exports, and Module Boundaries
• .d.ts Files, Ambient Declarations, and Module Augmentation
• Typing the DOM: Elements, Events, and Safe Narrowing
• Promises, async/await, and Safe Concurrency Patterns
• JSON, DTOs, and Runtime Validation for API Types
• tsconfig in Depth: Core Compiler Options (Part 1)
• tsconfig in Depth: Paths, Emit, and Project References (Part 2)
• Publishing and Consuming TypeScript Packages with npm
• The TypeScript Toolchain: tsc, Bundlers, Linters, and Editors
• Designing Robust, Maintainable TypeScript Code
• Debugging TypeScript: Reading Errors and Tracing Root Causes
• Building a Type-Safe Engineering Calculator