Typescript Advanced Types

What it does

This skill enables AI agents to work with advanced TypeScript features, such as conditional types, mapped types, and type inference. It allows for precise type manipulation, making it easier to build robust and scalable backend systems in TypeScript.

When to use it

• When developing complex type relationships or generic functions in a large-scale application
• When implementing utility types like Partial, Readonly, or custom conditional types
• When working on codebases that require strict type checking and advanced type transformations

Key capabilities

• Support for conditional types (T extends U ? X : Y)
• Mapped types for transforming object properties
• Type inference for generic functions and interfaces
• Utility type creation (e.g., Pick, Omit, Exclude)

Example prompts

• "Create a mapped type that converts all properties of an interface to readonly."
• "Generate a conditional type that checks if a value is a string or number."
• "Write a utility type that extracts the keys of an object with non-undefined values."

Tips & gotchas

• Ensure your TypeScript version supports advanced type features (e.g., 3.0+ for mapped types).
• Be cautious when using complex conditional types, as they can be difficult to debug if not properly tested.