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upstream-tanstack-query/docs/framework/angular/reference/interfaces/QueryClientConfig.md
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---
id: QueryClientConfig
title: QueryClientConfig
---
Defined in: [packages/query-core/src/types.ts:1495](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1495)
## Properties
### defaultOptions?
```ts
optional defaultOptions: DefaultOptions<Error>;
```
Defined in: [packages/query-core/src/types.ts:1504](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1504)
Default options for all queries and mutations created through this client.
***
### mutationCache?
```ts
optional mutationCache: MutationCache;
```
Defined in: [packages/query-core/src/types.ts:1502](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1502)
The mutation cache this client is connected to. A new `MutationCache` is created if not
provided.
***
### queryCache?
```ts
optional queryCache: QueryCache;
```
Defined in: [packages/query-core/src/types.ts:1497](https://github.com/TanStack/query/blob/main/packages/query-core/src/types.ts#L1497)
The query cache this client is connected to. A new `QueryCache` is created if not provided.