類型“{}”上不存在屬性“joiner”

Question

嘗試設置狀態是 tsx 但當我嘗試從 json 打開數據時返回此錯誤。

Property 'joiner' does not exist on type '{}'. TS2339

這是組件（刪除了無用的代碼）

import Player from '../components/Player'

import listingData from '../libs/listingData'

const Battle = () => {
    const [loading, setLoading] = useState(false);
    const [creatorState, setCreator] = useState({ health: 100, animate: false, recieve: false });
    const [opponentState, setOpponent] = useState({ health: 100, animate: false, recieve: false });
    const [data, setData] = useState({});

    const loadBattle = () => {
        setLoading(true);
        const id = parseInt((window.location.pathname).replace("/battle/", ""));
        setData(listingData[id])

        setLoading(false);
        setTimeout(() => triggerAttack("creator"), 5000);
    }

    useEffect(() => {
        loadBattle();
    }, [])

    return (
        <Root>
            <Player 
                weakness={loading ? '' : data.joiner.weakness} //Error triggered here
                image=""
                status="filled"
                price={2352.54}
                health={`${creatorState.health}%`}
                creator={false}
                recieve={creatorState.recieve}
                animate={creatorState.animate}
                loading={loading}
            />
        </Root>
    )
}

export default Battle

Player 組件 props 都設置了 any

json 中的對象示例

        price: 5251.52,
        status: 'filled',
        creator: {
            weakness: 'wind',
            address: '',
            image: '',
        },
        joiner: {
            weakness: 'water',
            address: '',
            image: '',
        },
    },

我對打字稿很陌生，所以我不熟悉類型，它說我沒有足夠的細節，所以這就是我寫的。

Answer 1

在這種情況下，您必須使用包含預期數據結構的接口鍵入您的狀態。 喜歡：

例子：

interface IUser {
  name: string;
}
const [user, setUser] = useState<IUser>({name: 'Jon'});

或者

interface Provider {
  connected: boolean;
  type: string;
}
const [wearablesList, setWearablesList] = useState<Provider[]>([]);