branded-types

SKILL.md

TypeScript uses structural typing, but sometimes you need nominal typing - values that are distinct because you SAY they are, not because they have different shapes. Brands let you do this without runtime overhead.

You can't actually create a value that is both a string and has a brand property:

Response: Type aliases don't prevent mixing up different string types.

當原始類型需要語義區分時使用。當字符串或數字類型具有不同含義時使用。當您需要名義輸入時使用。 來源：marius-townhouse/effective-typescript-skills。

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