自定义数据上传挂钩

我编写了一段简单的代码,在页面加载时从本地json服务器请求数据。我在几个地方重复了这段代码,我想把它放在自定义挂钩中。

告诉我如何正确编写和应用自定义钩子?

  const [data, setData] = useState()

  useEffect(() => {
    const getPosts = async () => {
      try {
        setData(await getData('http://localhost:3001/posts'))
      } catch (error) {
        console.log('ERROR >>', error.message)
      }
    }
    getPosts()
  }, [])

我试着这样写,但没用:

import { useEffect, useState } from "react"
import { getData } from './../helpers'

const useData = url => {

  const [currentData, setCurrentData] = useState()

  useEffect(() => {
    const getCurrentData = async () => {
      try {
        setCurrentData(await getData(url))
      } catch (error) {
        console.log('ERROR >>', error.message)
      }
    }
    getCurrentData()
  }, [url])
  
  return currentData
}

export default useData