映射属性，即下面属性全部映射为 stringtype PersonKey = "name" | "age"; type PersonType = Record<PersonKey, string>;

type PersonType = { name: string; age: string; }; type PersonType2 = Partial<PersonType>; type _

type T1 = Extract<"a" | "b" | "c", "a" | "f">; type T11 = "a"; // 等效于 type T2 = Exclude<"a" | "b" |

type Person = { id: string; name: string; age: number; }; type NewPersonPick = Pick<Person, "n

都可以用来描述对象或函数type Person = { name: string; move: (x: number) => void }; interface Person { name: st