比如当你使用 react-hook-form 构建表单时 function ComplicatedStuff() { const formMethods = useForm() const fieldValue = formMethods.watch("field") async function onSubmit() { await fetch('...', { method: 'POST', body: JSON.stringify({ fieldValue }) }) } return ( <> Live current va...
Q: Can I use useMemo and useCallback with async functions? A: No, bothuseMemoanduseCallbackare designed for synchronous functions only. If you need to memoize the result of an async function, you can use theuseAsynccustom hook or a library likereact-querythat provides caching and data-fetc...
@@ -17,8 +17,8 @@ export default function ChapterTreeView() { const setSelectedContent = useSetRecoilState(selectedContentState); const setMessage = useSetRecoilState(messageState); const handleSelectedCourseChange = React.useCallback( async (course: Course | null) => { React.useEffect(()...
const myAsyncCallback = useCallback(async () => { setLoading(true); // Await for an async function... const data = await yourAsyncFunction(...); // Complete with proper code here // While waiting for yourAsyncFunction to be done, // It's possible that your component had been unm...
export function useCoronaAPI( path, { initialData = null, converter = (data) => data, refetchInterval = null } ) { const [data, setData] = useState(initialData); useEffect(() => { const fetchData = async () => { const response = await fetch(`${BASE_URL}${path}`); ...
import{useState,useEffect}from"react";constBASE_URL="https://corona.lmao.ninja/v2";exportfunctionuseCoronaAPI(path,{initialData=null,converter=(data)=>data,refetchInterval=null}){const[data,setData]=useState(initialData);useEffect(()=>{constfetchData=async()=>{constresponse=awaitfetch(`${BASE...
const createQuote = async () => { try { setLoadingCreateQuote(true); const result = await usPost(componentProp.quickQuoteEndpoint, quoteDetails); if (result.data?.content) { /** TODO: next steps with quoteId & confirmationId */
- In components that perform asynchronous operations like fetching data, functions related to handling the async results can be memoized with `useCallback`. - I had a `DataFetchingComponent` that fetched data from an API. I had a function `handleData` that processed the fetched data. Using ...
This is related to #14092, #14066, reactjs/rfcs#83, and some other issues. The problem is that we often want to avoid invalidating a callback (e.g. to preserve shallow equality below or to avoid re-subscriptions in the effects). But if i...
回调函数 回调函数是什么鬼, 回调函数干嘛用，回调函数可以怎么用 如果有过android开发经验，经常可以...