fundamentals
TypeScript type system fundamentals and basic typing patterns
TypeScript type system fundamentals and basic typing patterns
TypeScript Fundamentals Skill
Overview
Master TypeScript's type system fundamentals including basic types, interfaces, and type annotations.
Topics Covered
Basic Types
- Primitive types (string, number, boolean)
- Arrays and tuples
- Enums
- Any, unknown, never, void
- Null and undefined handling
Type Annotations
- Variable annotations
- Function parameters and returns
- Object type annotations
- Type inference
- Type assertions
Interfaces
- Interface declaration
- Optional properties
- Readonly properties
- Index signatures
- Interface extension
Type Aliases
- Type alias syntax
- Union types
- Intersection types
- Literal types
- Type narrowing
Functions
- Function type expressions
- Call signatures
- Overloads
- Generic functions
- Rest parameters
Prerequisites
- JavaScript fundamentals
- ES6+ features
Learning Outcomes
- Write type-safe code
- Use interfaces effectively
- Apply type narrowing
- Understand type inference
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