[TS] typescript-excess-property-checks

https://www.typescriptlang.org/docs/handbook/release-notes/typescript-1-6.html#stricter-object-literal-assignment-checks

Documentation - TypeScript 1.6

 

사소하다 아래 코드에서 a=b는 되는데 왜 c = {a:"a", b: "B"} 가 안될까?

type A = { a : string }
type B = { a : string, b : string }

let a:A = {a: 'a'};
let b:B = {a: "A", b: "B"}; 
a = b; // OK

let c:A = {a: "A", b: "B"};  // Error

답 :  excess property checking only applies to object literals being directly assigned to a type with fewer properties. The line a = b is not assigning an object literal at all, so no excess property checks happen.

 

 

https://stackoverflow.com/questions/68992404/different-shapes-at-the-time-of-assignment-and-declaration-of-typescript

Different shapes at the time of assignment and declaration of typescript

https://levelup.gitconnected.com/typescript-excess-property-checks-6ffe5584f450

TypeScript —  Excess Property Checks

https://stackoverflow.com/questions/58864033/in-typescript-is-there-a-way-to-restrict-extra-excess-properties-for-a-partial

In TypeScript, is there a way to restrict extra/excess properties for a Partial type when the type is a parameter to a functi

https://ko.wikipedia.org/wiki/%EB%B2%A1%ED%84%B0%EC%9D%98_%EA%B3%B5%EB%B3%80%EC%84%B1_%EB%B0%8F_%EB%B0%98%EB%B3%80%EC%84%B1

벡터의 공변성 및 반변성 - 위키백과, 우리 모두의 백과사전

https://iamssen.medium.com/typescript-%EC%97%90%EC%84%9C%EC%9D%98-%EA%B3%B5%EB%B3%80%EC%84%B1%EA%B3%BC-%EB%B0%98%EA%B3%B5%EB%B3%80%EC%84%B1-strictfunctiontypes-a82400e67f2

TypeScript 에서의 공변성과 반공변성 (strictFunctionTypes)

https://velog.io/@goldentrash/Interface%EC%99%80-Excess-Property-Check

Interface와 Excess Property Check

https://www.typescriptlang.org/docs/handbook/interfaces.html

Handbook - Interfaces