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.

在键入具有多种返回类型的函数时使用。当函数行为取决于输入类型时使用。在处理联合类型输入时使用。在考虑函数重载时使用。 来源：marius-townhouse/effective-typescript-skills。

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