单击按钮时如何更新 useEffect 挂钩？（按钮的提交方法怎么写？）

Question

我正在开发一个 API 应用程序，当用户输入职位描述或位置时，该应用程序将 return 一个职位列表。最初，该页面将 return 所有作业并在第一次渲染时将它们显示到屏幕上（默认 useEffect）。现在我希望当用户点击按钮时，页面将根据用户的输入呈现一个作业列表。我如何在我的 onSubmit 函数上执行此操作以更新 useEffect 挂钩的值？

import React, { useState, useEffect} from 'react';
import SearchForm from './componenets/Form.js';
import JobLists from './componenets/JobLists'
import axios from 'axios'

function App() {
  const [posts, setPosts] = useState([]) //posts store a list of jobs
  const [description, setDescription] = useState('') //description of the job (user's input)
  const [location, setLocation] = useState('') //location of the job (user's input)

  //description input handle
  const handleDescriptionChange = (e) => {
    setDescription(e.target.value);
  }
  
  //location input handle
  const handleLocationChange = (e) => {
    setLocation(e.target.value);
  }

  //submit button handle
  const onSubmit = e => {
    e.preventDefault();
    //once the user enter input and clicks on button, update the the useEffect hooks

  }

  //get data from github job API (fetching by description and location)
  const url = `https://cors-anywhere.herokuapp.com/https://jobs.github.com/positions.json?description=${description}&location=${location}`
  useEffect(() => {
    axios.get(url)
    .then(res =>{
        console.log(res)
        setPosts(res.data)
    })
    .catch(err =>{
        console.log(err)
    })
}, [])

  return (
    <div>
    <SearchForm
        description={description}
        handleDescriptionChange={handleDescriptionChange}
        location={location}
        handleLocationChange={handleLocationChange}
        onSubmit={onSubmit} />
    {
        posts.map((job) => <JobLists job={job} key={job.id} />) //map through each job
    }
    </div>
  )
}
export default App;

Answer 1

https://codesandbox.io/s/react-form-example-gm9o6

import React, { useState, useEffect } from 'react'
import SearchForm from './componenets/Form.js'
import JobLists from './componenets/JobLists'
import axios from 'axios'

const App = () => {
  const [posts, setPosts] = useState([]) //posts store a list of jobs
  const [description, setDescription] = useState('') //description of the job (user's input)
  const [location, setLocation] = useState('') //location of the job (user's input)
  const url = `https://cors-anywhere.herokuapp.com/https://jobs.github.com/positions.json?description=${description}&location=${location}`

  const getPosts = async () => {
    await axios
      .get(url)
      .then((res) => {
        console.log(res)
        setPosts(res.data)
      })
      .catch((err) => {
        console.log(err)
      })
  }

  //get data from github job API (fetching by description and location)
  useEffect(() => {
    getPosts()
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [])

  //description input handle
  const handleDescriptionChange = (e) => {
    setDescription(e.target.value)
  }

  //location input handle
  const handleLocationChange = (e) => {
    setLocation(e.target.value)
  }

  //submit button handle
  const onSubmit = (e) => {
    e.preventDefault()
    //once the user enter input and clicks on button, update the the useEffect hooks
    getPosts()
  }

  return (
    <div>
      <SearchForm
        description={description}
        handleDescriptionChange={handleDescriptionChange}
        location={location}
        handleLocationChange={handleLocationChange}
        onSubmit={onSubmit}
      />
      {
        !!posts?.length &&
          posts.map((job) => <JobLists key={job.id} job={job} />) //map through each job
      }
    </div>
  )
}
export default App

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