# Aborting Procedure Calls

> Cancel in-flight requests when a component unmounts with the abortOnUnmount option on a query

By default, tRPC doesn't cancel a request when the component that made it unmounts. To cancel it, set `abortOnUnmount` in the `trpc` option of the query:

```tsx title="pages/posts/[id].tsx"
import { skipToken, useQuery } from '@tanstack/react-query';
import { useRouter } from 'next/router';
import { useTRPC } from '../../utils/trpc';

export default function PostViewPage() {
  const router = useRouter();
  // `query.id` is undefined until the router is ready
  const id = router.query.id;
  const trpc = useTRPC();
  const postQuery = useQuery(
    trpc.post.byId.queryOptions(typeof id === 'string' ? { id } : skipToken, {
      trpc: { abortOnUnmount: true },
    }),
  );

  switch (postQuery.status) {
    case 'pending':
      return <p>Loading...</p>;
    case 'error':
      return <p>Error: {postQuery.error.message}</p>;
    case 'success':
      return <h1>{postQuery.data.title}</h1>;
  }
}
```

There's no global switch: `createTRPCContext()` takes no options, so set it on each query that needs it. It works for `queryOptions` and `infiniteQueryOptions`, since TanStack React Query only cancels queries.

With `httpBatchLink` or `httpBatchStreamLink`, the HTTP request only stops once every query in its batch is cancelled. Cancelling one query alone just drops its result. To stop the request for a single query, send it through `httpLink`, for instance with a [`splitLink`](https://trpc.io/docs/client/links/splitLink.md).

> [!NOTE]
> `createTRPCNext`'s `abortOnUnmount` in `config` set this for every query. Like the rest of `createTRPCNext`, it's deprecated. See [Moving from `createTRPCNext`](https://trpc.io/docs/client/nextjs/pages-router/setup.md#moving-from-createtrpcnext).