小编典典

React Hook useEffect缺少依赖项:“列表”

reactjs

一旦运行以下代码,就会出现以下错误:

React Hook useEffect缺少依赖项:“列表”。包括它或删除依赖项数组react-hooks / exhaustive-deps

我找不到警告的原因。

import React, { useState, useEffect } from 'react';
import axios from 'axios';
import Form from './Form';

const App = () => {
  const [term, setTerm] = useState('pizza');
  const [list, setList] = useState([]);

  const submitSearch = e => {
    e.preventDefault();
    setTerm(e.target.elements.receiptName.value);
  };

  useEffect(() => {
    (async term => {
      const api_url = 'https://www.food2fork.com/api';
      const api_key = '<MY API KEY>';

      const response = await axios.get(
        `${api_url}/search?key=${api_key}&q=${term}&count=5`
      );

      setList(response.data.recipes);
      console.log(list);
    })(term);
  }, [term]);

  return (
    <div className="App">
      <header className="App-header">
        <h1 className="App-title">Recipe Search</h1>
      </header>
      <Form submitSearch={submitSearch} />
      {term}
    </div>
  );
};

export default App;

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2020-07-22

共1个答案

小编典典

在useEffect内部,您正在记录list

console.log(list);

因此,您需要删除上面的行,或者最后添加list到useEffect依赖项。所以改变这条线

}, [term]);

}, [term, list]);
2020-07-22