React sucks?

App.js

import React, { useState, useEffect } from 'react'
  
  const App = () => {
   	const [docs, setDocs] = useState(null)
    const [isFetchingDocs, setIsFetchingDocs] = useState(false)
    const userId = "user123"

    const getDocs = (userId) => {
      // some async functoin
      console.log("function getDocs ran")
    }

    useEffect(() => {
      let isMounted = true
      if (!isFetchingDocs && userId) {
        (
          async () => {
            try {
              setIsFetchingDocs(true)
              const response = await getDocs(userId)

              // prevent memory leaks, only set docs if isMounted
              if (isMounted) {
                setDocs(docs => {
                  if (!docs) {
                    return response
                  } else return docs
                })

                setIsFetchingDocs(false)
              }
            } catch (err) {
              setIsFetchingDocs(false)
              console.log(err)
            }
          }
        )()
      }

      return () => {
        isMounted = false
      }
    }, [
      userId,
      getDocs,
      setIsFetchingDocs,
      setDocs
    ])
  
    return (
      <ul>
        {
          isFetchingDocs ? <li>...loading</li>
          :
          docs.map(doc => {
            return <li>{doc.name}</li>
          }
        }
      </ul>
    )
  
  }
  
  export default App

My mistake was tracking if the component was mounted within a useEffect that set the isFetchingDocs state. I ended up using a separate useEffect with an empty dependency array that set a isMounted useRef variable. I then had a the fetching function within the component but as a pure funtion that set the isFetching state, fetched the data then set the data and isFetchingDocs to false if the isMounted was true. Ended up with one fetch call, no memory leak warnings and no eslint warnings :) it is a bit cumbersome to do all of this just to fetch some data though... Maybe it would be better to fetch the data outside of a useEffect?

Solution gist here