TypeScript infer keyword All In One

TypeScript infer keyword All In One

Conditional Types / 条件类型

infer keyword

https://www.typescriptlang.org/docs/handbook/2/conditional-types.html#inferring-within-conditional-types

https://www.typescriptlang.org/docs/handbook/type-inference.html

https://www.cnblogs.com/xgqfrms/tag/infer/

demos

// Here we declare a new type variable `R` in MyType, which gets `inferred` from `T`.
type MyType<T> = T extends infer R ? R : never;

type T1 = MyType<{b: string}> 
// T1 is { b: string; }

refs

TypeScript 协变与逆变 All In One

https://www.cnblogs.com/xgqfrms/p/16200884.html

https://stackoverflow.com/questions/60067100/why-is-the-infer-keyword-needed-in-typescript

https://blog.logrocket.com/understanding-infer-typescript/

https://levelup.gitconnected.com/using-typescript-infer-like-a-pro-f30ab8ab41c7

https://www.tutorialsteacher.com/typescript/type-inference

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