Configure AbortSignal in the middleware

[wan54]

"@tanstack/react-start": 1.169.3

Is there a way to configure AbortSignal in the middleware?

Is this currently supported?

[D3OXY]

In 1.169.3, next({ signal }) isn't part of the supported middleware API. The types for that release don't expose a signal option on next.

For a server-function call, you can pass it at the call site:

const controller = new AbortController()

const result = await myServerFn({
  // data: ...,
  signal: controller.signal,
})

// Call controller.abort() from your cancellation handler.

That's supported by FetcherBaseOptions.

If you want to configure the outgoing RPC request centrally, client function middleware supports next({ fetch: customFetch }). You can customize the fetch options there; preserve any existing signal if you're combining it with a timeout. See the middleware documentation.

For request middleware, the incoming signal is request.signal; next doesn't replace it. Aborting the client request doesn't guarantee that work already running on the server stops.