conditional-types-over-overloads

SKILL.md

When a function's return type depends on its input type, you might reach for overload signatures. However, conditional types often provide a better solution. Unlike overloads, which are checked independently, conditional types distribute over unions and can be analyzed as a single expression. This makes them more powerful for handling union inputs and results in more maintainable type declarations.

Understanding when to use conditional types versus overloads is key to writing flexible, correct type signatures.

Prefer conditional types to overloaded signatures. Conditional types distribute over unions and provide more precise, maintainable type declarations.

여러 반환 유형이 있는 함수를 입력할 때 사용합니다. 함수 동작이 입력 유형에 따라 달라질 때 사용합니다. 공용체 유형 입력을 처리할 때 사용합니다. 함수 과부하를 고려할 때 사용합니다. 출처: marius-townhouse/effective-typescript-skills.

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