TypeScript for Beginners

Module 1: Getting Started with TypeScript

• What TypeScript adds to JavaScript and why teams adopt it for larger codebases
• Installing TypeScript and creating a project with tsconfig.json
• Compiling TypeScript to JavaScript and understanding the build step
• Using a code editor with TypeScript for real-time type feedback and autocompletion

Module 2: Core Types and Type Annotations

• Primitive types: string, number, boolean, null, undefined, and when to use each
• Type annotations on variables, function parameters, and return values
• Arrays, tuples, and the difference between typed and untyped collections
• Type inference and when explicit annotations are needed versus optional

Module 3: Functions, Objects, and Interfaces

• Typing function signatures with required, optional, and default parameters
• Defining object shapes with interfaces and type aliases
• Extending and composing interfaces for reusable type definitions
• Read-only properties, index signatures, and practical patterns for structured data

Module 4: Union Types, Narrowing, and Control Flow

• Union types for values that can have more than one shape or type
• Type narrowing with typeof, truthiness checks, and equality comparisons
• Literal types and how they combine with unions for precise data modeling
• The unknown and never types and how they differ from any

Module 5: Generics and Utility Types

• What generics solve and how to write generic functions and interfaces
• Constraining generic types with extends to ensure type safety
• Built-in utility types: Partial, Required, Pick, Omit, and Record
• Combining generics with interfaces for flexible and reusable patterns

Module 6: Modules, Project Organization, and Practical Setup

• Import and export syntax for organizing code across multiple files
• Enums versus const objects for named constants and trade-offs of each approach
• Type-only imports and exports for clean separation of types and runtime code
• Setting up a starter project with strict mode, modules, and type-safe configuration