Node.js Vercel Functions now support per-path request cancellation
Node.js Vercel Functions can now detect cancelled requests and stop execution early by configuring supportsCancellation in vercel.json on a per-path basis. This reduces wasted compute and token generation when users navigate away or close tabs.
can now detect when a request is cancelled and stop execution before completion. This is configurable on a per-path basis, and includes actions like navigating away, closing a tab, or hitting stop on an AI chat to terminate compute processing early.Vercel Functions using Node.js
This reduces unnecessary compute, token generation, and sending data the user would never see.
To enable cancellation, add to your configuration. You can apply it to specific paths or all functions:"supportsCancellation": truevercel.json
Once enabled, you can listen for cancellation using or the event:Request.signal.abortedabort
If you’re using the , forward the to your stream:AI SDKabortSignal
Learn more about .cancelling Function requests
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