TYPES-generics

What problem does it solve?

Writing flexible, reusable code often sacrifices type safety, leading to any type abuse and runtime errors. This Skill teaches how to leverage TypeScript generics to create adaptable code while preserving full type safety.

Core Features & Use Cases

• Generic Constraints: Limit what types a generic parameter can be, enabling type-safe property access and method calls.
• Type-Safe Defaults: Use unknown or no default for generic parameters, avoiding the pitfalls of any.
• Mapped Types: Systematically transform existing types (e.g., Partial, Readonly, Pick) to create new, derived types.
• Conditional Types: Create types that depend on conditions, enabling advanced type transformations like Awaited or Parameters.
• Use Case: Create a generic Container class that can hold any type of value while maintaining full type safety for its map and flatMap methods, ensuring type correctness regardless of the contained data.

Quick Start

Implement a generic getProperty function that safely extracts a property from an object, ensuring type safety for both the object and the key.