What problem does it solve?
TypeScript reduces runtime type errors and unclear APIs by adding static types, compiler checks, and explicit interfaces to JavaScript codebases. It helps teams catch bugs early, document intent through types, and maintain large codebases with confidence.
Core Features & Use Cases
- Type annotations for primitives, arrays, tuples, unions, and literal types to make values explicit and verifiable at compile time.
- Interfaces, type aliases, and utility types to model domain objects, enable declaration merging, and create reusable shapes.
- Generics and constrained generics to build flexible, type-safe abstractions for containers, functions, and APIs.
- Advanced patterns including conditional types, mapped types, template literal types, and inference helpers for complex type transformations.
- Practical guidance on functions, classes, type guards, and tsconfig settings to migrate projects, enforce strict mode, and integrate with build tools and frameworks like React.
Quick Start
Use the TypeScript Development skill to add types to a JavaScript function, create an interface for its object parameters, and enable strict compiler options for safer compilation.
