Can Intersection give an example

piotrwitek / utility-types

Collection of utility types, complementing TypeScript built-in mapped types and aliases (think "lodash" for static types).

MIT License

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Can Intersection give an example #164

Open xuwenhao0803 opened 3 years ago

xuwenhao0803 commented 3 years ago

Why does Intersection need Extract<keyof T, keyof U> & Extract<keyof U, keyof T> to write Extract<keyof T, keyof U> or Extract<keyof U, keyof T> separately?