PlaceholderDataFunction
TypeScript
1type PlaceholderDataFunction<TQueryFnData = unknown, TError = DefaultError, TQueryData = TQueryFnData, TQueryKey extends QueryKey = QueryKey> = (previousData: TQueryData | undefined, previousQuery:2 | Query<TQueryFnData, TError, TQueryData, TQueryKey>3 | undefined) => TQueryData | undefined;定义于:packages/query-core/src/types.ts:270
类型参数
TQueryFnData
TQueryFnData = unknown
TError
TError = DefaultError
TQueryData
TQueryData = TQueryFnData
TQueryKey
TQueryKey extends QueryKey = QueryKey
参数
previousData
TQueryData | undefined
previousQuery
| Query<TQueryFnData, TError, TQueryData, TQueryKey>
| undefined
返回值
TQueryData | undefined