TypeScript Advanced Types

Comprehensive guidance for mastering TypeScript's advanced type system including generics, conditional types, mapped types, template literal types, and utility types for building robust, type-safe applications.

Quick Reference

See references/best-practices.md for practical guidelines on:

• Configuration: Essential tsconfig.json settings (strict, noUncheckedIndexedAccess, exactOptionalPropertyTypes)
• Type Inference vs Explicit Types: When to annotate vs let TypeScript infer
• Interfaces vs Types: Strategic guidelines for choosing between them
• Module/Path Mapping: tsconfig paths and barrel exports patterns
• Error Handling: Custom error classes and Result pattern
• Performance: Type system performance considerations
• Type Testing: Expect<Equal<X, Y>> patterns for compile-time type tests

When to Use This Skill