如果我需要向多个端点发送请求,我应该如何制作自定义反应钩子?

Mir*_*ung 3 reactjs react-hooks

我需要向许多端点发送GETPOST请求。

例如,GET | POST水果清单、GET | POST天气清单...

不是在一页上,它们是分开的(浏览器路由)。例如)水果页面,天气页面...

我想知道如何在这种情况下制作自定义反应钩子。

我搜索了很多,但所有的写作都是基于一个单一的 api 端点。


方式一

创建一个可重用的 fetch 函数。

function useGetFetch(url){
    const response = await fetch(url, ...
    return response.json()
}

function usePostFetch(url){
    const response = await fetch(url, ...
    return response.json()
}
Run Code Online (Sandbox Code Playgroud)

方式二

为每个创建一个函数。

function getFruitList(){
    const response = await fetch('/fruit', ...
}

function postFruitList(){
    const response = await fetch('/fruit', ...
}

function getWeatherList(){
    const response = await fetch('/weather', ...
}

function postWeatherList(){
    const response = await fetch('/weather', ...
}
Run Code Online (Sandbox Code Playgroud)

Lak*_*kur 6

读过useAsync一次关于肯特的钩子,我认为你的第二种方法很适合。以下是使用useAsyncstar-wars API 示例制作可重用钩子的完整代码:-

import "./styles.css";
import React, { useEffect } from "react";
export default function App() {
  const {
    run: starShipExec,
    status: starshipStatus,
    data: starshipData,
    error: startshipError
  } = useAsync({ status: "idle" });
  const {
    run: peopleExec,
    status: peopleStatus,
    data: peopleData,
    error: peopleError
  } = useAsync({ status: "idle" });

  useEffect(() => {
    starShipExec(getStarships());
    peopleExec(getPeople());
  }, [starShipExec, peopleExec]);

  return (
    <div className="App">
      Startships
      <ul>
        {starshipData?.results.map((res) => (
          <li>{res.name}</li>
        ))}
      </ul>
      People
      <ul>
        {peopleData?.results.map((res) => (
          <li>{res.name}</li>
        ))}
      </ul>
    </div>
  );
}

async function getStarships() {
  return await fetch("https://swapi.dev/api/starships");
}

async function getPeople() {
  return await fetch("https://swapi.dev/api/people");
}

function asyncReducer(_state, action) {
  switch (action.type) {
    case "pending": {
      return { status: "pending", data: null, error: null };
    }
    case "resolved": {
      return { status: "resolved", data: action.data, error: null };
    }
    case "rejected": {
      return { status: "rejected", data: null, error: action.error };
    }
    default: {
      throw new Error(`Unhandled action type: ${action.type}`);
    }
  }
}

function useSafeDispatch(dispatch) {
  const mountedRef = React.useRef(false);
  React.useLayoutEffect(() => {
    mountedRef.current = true;
    return () => (mountedRef.current = false);
  }, []);

  const safeDispatch = React.useCallback(
    (...args) => {
      mountedRef.current && dispatch(...args);
    },
    [dispatch]
  );
  return safeDispatch;
}

function useAsync({ status }) {
  const [state, unsafeDispatch] = React.useReducer(asyncReducer, {
    status: status,
    data: null,
    error: null
  });
  const dispatch = useSafeDispatch(unsafeDispatch);

  const run = React.useCallback(
    (promise) => {
      if (!promise) {
        return;
      }
      dispatch({ type: "pending" });
      promise
        .then((data) => data.json())
        .then((data) => {
          dispatch({ type: "resolved", data });
        })
        .catch((error) => {
          dispatch({ type: "rejected", error });
        });
    },
    [dispatch]
  );

  return { ...state, run };
}

Run Code Online (Sandbox Code Playgroud)

我喜欢的部分是返回run函数,我们可以将 any承诺传递到其中,其余部分由钩子管理。它使 API 的用户可以更好地控制要执行的内容。

这是一个有效的代码和框:-

编辑 useAsync-star-wars