W3School TIY Editor

interface Person { name: string; age: number; location?: string; } const bob: Pick<Person, 'name'> = { name: 'Bob' // `Pick` 只保留了 `name` 属性，所以 `age` 和 `location` 属性已从类型中移除，无法在此处定义 }; console.log(bob);