TypeScript Best Practices

Guidance for writing type-safe, maintainable TypeScript code. Covers type safety fundamentals, async/await patterns, and null handling strategies.

Core Principles

1. Strict mode always: Enable strict: true in tsconfig.json
2. Explicit over implicit: Prefer explicit types for public APIs
3. Narrow types: Use discriminated unions over loose object types
4. Null safety: Handle null/undefined explicitly with strict null checks
5. Immutability: Prefer readonly and const where possible

Type Safety

Prefer Interfaces for Object Shapes