TypeScript Patterns

Overview

Advanced TypeScript patterns that use the type system to prevent runtime errors. Focuses on strict mode TypeScript with patterns for type inference, narrowing, and compile-time validation. Not a beginner tutorial.

When to use: Building type-safe APIs, complex data transformations, library authoring, preventing runtime errors through types, working with strict mode flags.

When NOT to use: Learning TypeScript basics (primitives, interfaces, classes), JavaScript-to-TypeScript migration guidance, tooling setup, or build configuration.

Quick Reference