TypeScript类型挑战-刷题

TypeScript类型挑战

vscode刷题

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热身题

1. // ============= Test Cases =============
   import type { Equal, Expect, NotAny } from "./test-utils";type cases = [Expect<NotAny<HelloWorld>>, Expect<Equal<HelloWorld, string>>];// ============= Your Code Here =============
   type HelloWorld = string; // expected to be a string
   

容易题

1. // ============= Test Cases =============
   import type { Equal, Expect } from "./test-utils";type cases = [Expect<Equal<Expected1, MyPick<Todo, "title">>>,Expect<Equal<Expected2, MyPick<Todo, "title" | "completed">>>,// @ts-expect-errorMyPick<Todo, "title" | "completed" | "invalid">
   ];interface Todo {title: string;description: string;completed: boolean;
   }interface Expected1 {title: string;
   }interface Expected2 {title: string;completed: boolean;
   }// ============= Your Code Here =============
   type MyPick<T, K extends keyof T> = { [Key in K]: T[Key] };