使用使用效果钩React的无休止的后端请求

发布于 2025-02-13 21:22:12 字数 410 浏览 0 评论 0原文

我正在尝试向我的后端提出AA请求，因此当我的组件加载时，它可以接收一些数据以渲染。

问题在于，该应用程序以消耗资源的无限请求循环进行。

我在做什么错？

  useEffect(() => {
    Axios.post("http://localhost:3005/people", {UUID}).then((response) => {
        const peopleArray = [];
        for (let key in response.data) {
          peopleArray.push({ ...response.data[key] });
        }
        setPeople(peopleArray);
      });
  });

原文

I'm trying to make a a request to my back-end so when my component loads it can receive some data to render.

the problem is that the application goes in an infinite loop of requests that consumes resources.

what am I doing wrong?

  useEffect(() => {
    Axios.post("http://localhost:3005/people", {UUID}).then((response) => {
        const peopleArray = [];
        for (let key in response.data) {
          peopleArray.push({ ...response.data[key] });
        }
        setPeople(peopleArray);
      });
  });

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忘年祭陌 2025-02-20 21:22:12

您需要一系列依赖性来使用效果，仅在已安装的组件上运行或这些依赖项中的任何一个。就像没有依赖数组一样，它将随着每个渲染而运行，这将导致无限循环。

      useEffect(() => {
    Axios.post("http://localhost:3005/people", {UUID}).then((response) => {
        const peopleArray = [];
        for (let key in response.data) {
          peopleArray.push({ ...response.data[key] });
        }
        setPeople(peopleArray);
      });
  }, []);

You need to an array of dependences to useEffect, to only run on the component mounted or any of these dependencies change. as without an array of dependences, it will run with each render, which will cause an infinite loop.

      useEffect(() => {
    Axios.post("http://localhost:3005/people", {UUID}).then((response) => {
        const peopleArray = [];
        for (let key in response.data) {
          peopleArray.push({ ...response.data[key] });
        }
        setPeople(peopleArray);
      });
  }, []);

回复收藏 0 原文

沉默的熊 2025-02-20 21:22:12

检查 documentation
或检查此示例 w3school

useEffect(() => {
 Axios.post("http://localhost:3005/people", {UUID}).then((response) => {
    const peopleArray = [];
    for (let key in response.data) {
      peopleArray.push({ ...response.data[key] });
    }
    setPeople(peopleArray);
 });
}, []); // <- add empty brackets here

Check the Documentation
or check this example w3school

Only run the effect on the initial render:

useEffect(() => {
 Axios.post("http://localhost:3005/people", {UUID}).then((response) => {
    const peopleArray = [];
    for (let key in response.data) {
      peopleArray.push({ ...response.data[key] });
    }
    setPeople(peopleArray);
 });
}, []); // <- add empty brackets here

回复收藏 0 原文

~没有更多了~