avoid-unnecessary-type-params

SKILL.md

The "Golden Rule of Generics" states that type parameters should appear twice or more in a function signature. If a type parameter only appears once, it's not relating anything and is likely unnecessary. Unnecessary type parameters create a false sense of type safety and can make inference less successful.

This skill helps you identify and eliminate superfluous type parameters, resulting in cleaner, more maintainable code that TypeScript can infer more effectively.

Type parameters must appear twice or more to establish a relationship. If a type parameter only appears once, strongly reconsider if you need it.

在编写泛型函数或类型时使用。在检查类型签名时使用。当类型参数仅出现一次时使用。当想要添加泛型以实现“灵活性”时使用。 来源：marius-townhouse/effective-typescript-skills。

查看原文