打字稿中自定义对象的类型

Question

我是打字稿的新手，我创建了这个对象：

const initialState = {
    title: {
        value: "",
        error: false
    },
    amount: {
        value: 0,
        error: false
    },
    type: "Food",
    time: new Date()
} 

我想使用 is 作为 useState 的初始状态。 因此我现在想要将我需要作为类型传递给我的 useState 的内容。 const [Form, setForm] = useState< "what should come here?" >(initialState) const [Form, setForm] = useState< "what should come here?" >(initialState) ；

提前致谢，

Answer 1

interface IState {
  title: {
    value: string;
    error: boolean;
  };
  amount: {
    value: number;
    error: boolean;
  };
  type: string;
  time: Date;
}

const [Form, setForm] = useState<IState>(initialState);

Answer 2

你可以这样做：

interface SomeName {
    value: string;
    error: boolean;
}

interface IState {
  title: SomeName;
  amount: SomeName;
  type: string;
  time: Date;
}

const initialState: IState = {
    title: {
       value: "",
       error: false
    },
    amount: {
       value: 0,
       error: false
    },
    type: "Food",
    time: new Date()
} 

const [Form, setForm] = useState<IState>(initialState);