typescript-interface-vs-type

What problem does it solve?

This Skill clarifies the often confusing distinction between interface and type in TypeScript, guiding developers on when to use each for optimal code clarity and performance.

Core Features & Use Cases

• Guidance on Usage: Provides clear rules for when to prefer interface (object types, extensions, class implementations) versus type (unions, mapped types, conditional types, tuples).
• Best Practices: Recommends using interface extends over type intersections for better error messages and TypeScript performance.
• Use Case: When defining a new data structure for a user profile, this skill helps you decide whether to use interface or type based on whether you need to extend existing types or use union types.

Quick Start

Use the typescript-interface-vs-type skill to understand when to use interface versus type for defining object types in TypeScript.