<QueryClientProvider client={queryClient}> <Example /> </QueryClientProvider> ) } 在创建QueryClient的时候,我们可以传入一些参数,用于管理项目中的请求、缓存、日志的相关配置,这些配置会对整个项目生效,其中包含了四个模块的配置参数。 new QueryClient({ queryCache?:
queryFunction(queryFn) 其中["repoData"]就是queryKey,而后面的请求方法就是 queryFn。 queryKey 的作用,用于React Query的管理:包括并发控制、请求状态控制和缓存的识别;而 queryFn 则是整个过程中请求远程数据的逻辑。 当我们使用 useQuery 的时候,React Query就开始运行 queryFn 进而请求后端的数据,同时能给我...
import{ useQuery }from'react-query'functionExample(){// 1)const { isLoading,isError,error,data}=useQuery('repoData',()=>fetch('https://api.github.com/repos/tannerlinsley/react-query').then(res=>res.json()))// 2)if(isLoading)return'Loading...'if(isError)return'An error has occurred...
isLoading,error}=useQuery("getStar",()=>axios.get("https://api.github.com/repos/tannerlinsley/react-query"));if(isLoading)return"数据获取中...";if(error)return"发生错误: "+error.message;return(react-query获得了{data.stargazers_count}颗星);}复制代码 在这里使用use...
以上面Example组件为例,我们已经拉取到了data,现在我们想新增一条数据,那我们可以 代码语言:javascript 代码运行次数:0 运行 AI代码解释 const {isLoading,isError,isSuccess,mutate} = useMutation({ mutationFn: async (newData) => insertNewData(newData), onSuccess: () => { queryClient.invalidateQueries(...
Unlike queries, mutations are typically used to create/update/delete data or perform server side-effects. For this purpose, TanStack Query exports a useMutation hook. Here's an example of a mutation t...
For that, React Query has mutations. Unlike queries, mutations accept callbacks that will be executed onSuccess, onError, and onMutate (when the mutation is started). And return a mutate function to perform the function you passed to mutationFn. Let's look at an example: export const useCr...
React Query devtools. (Large preview) Nice one! Authentication# To be able to use our app, we should log in by entering the email and password. The server returns the token and we store it in cookies (in the example app any combination of email/password works). When a user goes around...
[deleteCountryMutation], ); deleteCountryMutation又是从 react-query 突变而来的,所以应该没问题: const deleteCountryMutation = useMutation({...}); 最后一步是对TableBody进行记忆化,并渲染经过记忆化的子单元。如果所有内容都正确地进行了 memoize,那么在输入时就不会再重新渲染行和单元格了。
React Query provides two ways to optimistically update your UI before a mutation has completed. You can either use the onMutate option to update your cache directly, or leverage the returned variables...