我有以下 http 钩子：

export const useHttp = <T,>(initUrl: string, initData: T) => {
    const [url, setUrl] = useState(initUrl);
    const [state, dispatch] = useReducer(fetchReducer, {
        isLoading: false,
        error: '',
        data: initData
    });

    useEffect(() => {
        let cancelRequest = false;

        const fetchData = async (cancelRequest: boolean = false) => {
            if (!url) return;

            dispatch({ type: 'API_REQUEST'});
            try {
                const responsePromise: AxiosPromise<T> = axios(url);
                const response = await responsePromise;
                if (cancelRequest) return;
                dispatch({ type: 'API_SUCCESS', payload: response.data });
            } catch (e) {
                console.log("Got error", e);
                dispatch({ type: 'API_ERROR', payload: e.message });
            }
        };
        fetchData(cancelRequest);

        return () => {
            cancelRequest = true;
        }

    }, [url]);

    const executeFetch = (url: string) => {
        setUrl(url);
    };

    return { ...state, executeFetch}
};

减速器：

const fetchReducer = <T,>(state: IState<T>, action: TAction<T>): IState<T> => {
    switch (action.type) {
        case 'API_REQUEST':
            return {
                ...state,
                isLoading: true
            };
        case 'API_SUCCESS':
            return {
                ...state,
                data: action.payload,
                isLoading: false,
                error: ''
            };
        case 'API_ERROR':
            console.error(`Triggered: ${API_ERROR}, message: ${action.payload}`);
            return {
                ...state,
                error: action.payload,
                isLoading: false,
            };
        default:
            throw Error('Invalid action');
    }
};

行动：

export interface IApiSuccess<T> {
    type: types.ApiSuccess,
    payload: T;
}
export type TAction<T> = IApiRequest | IApiSuccess<T> | IApiError;

像这样使用：

const { data, error, isLoading, executeFetch } = useHttp<IArticle[]>('news', []);

return (
        <>
            <div className={classes.articleListHeader}>
                <h1>Article List</h1>
                <small className={classes.headerSubtitle}>{data.length} Articles</small>
            </div>
            <ul>
                {data.map(article => <Article article={article}/>)}
            </ul>
        </>
    )

我的 TS 对我大喊大叫，因为我正在使用data变量：Object is of type 'unknown'. TS2571

我确实指定了 useHttp 的类型，即 IArtlce[]。知道我错过了什么吗？

更新：我尝试为我的减速器添加返回类型：

interface HttpReducer<T> extends IState<T> {
    executeFetch: (url: string) => void
}

export const useHttp = <T,>(initUrl: string, initData: T): HttpReducer<T> => {

但我得到：

Type '{ executeFetch: (url: string) => void; error: string; isLoading: boolean; data: unknown; }' is not assignable to type 'HttpReducer<T>'.