Automated summary
Explains how to cancel or debounce Riverpod async requests using ref.onDispose together with auto-dispose providers.
Strengths
- Shows the concrete ref.onDispose(client.close) pattern for cancelling an in-flight request
- Clearly separates the two scenarios: cancelling on page exit and debouncing rapid refreshes
- Details the didDispose flag with Future.delayed trick to abort a refresh triggered too quickly
- Suggests a reusable extension on Ref to centralise debounce and cancellation logic
Limitations
- Code snippets stay schematic; the exact API depends on the HTTP package you use
- Defers to the official Riverpod how-to for a complete extension example
- Assumes prior familiarity with auto-dispose and ref.watch
Reach for it when a Riverpod provider must cancel a request as the user leaves the page or avoid repeated calls during rapid refreshes.
Skip it if you are not using Riverpod, or if you need a generic cancellation approach independent of provider lifecycle.
Security analysis
SafeThe skill provides guidance on Riverpod provider lifecycle and debouncing patterns in Dart/Flutter. It does not instruct destructive actions, exfiltration, obfuscation, or use of powerful tools. No executable commands or network operations are invoked by the skill itself.
No concerns found
How this analysis is madeExamples
My Flutter provider keeps fetching after the user navigates away. How do I cancel the in-flight request when the provider is disposed with Riverpod?Users spam the refresh button and we fire a request every tap. Show me how to debounce Riverpod refreshes with ref.onDispose and a delay.Write a Ref extension in Riverpod that debounces requests and cancels them on dispose so I can reuse it across providers.name: riverpod-cancel description: Cancel or debounce Riverpod async requests with ref.onDispose; cancel when user leaves the page, debounce rapid refreshes. Use when the user asks about cancelling requests, debouncing, or cleaning up when a provider is disposed.
Riverpod — Cancelling and debouncing requests
Instructions
Use ref.onDispose together with auto-dispose (or ref.watch) to cancel in-flight requests when the user leaves the page, or to debounce rapid refreshes.
Cancelling when leaving the page
Ensure the provider is auto-dispose. When the user navigates away, the provider loses its listeners and is disposed; ref.onDispose runs. In that callback, cancel the request (e.g. close the HTTP client used for the request).
Example pattern: create an http.Client() in the provider, pass it to your fetch logic, and call ref.onDispose(client.close). When the provider is disposed, the client closes and the request is cancelled. Exact API depends on your HTTP package.
Debouncing refreshes
If the user triggers refresh multiple times quickly, you can delay the actual request until they stop (e.g. 500ms). Pattern:
- In the provider, set a flag (e.g.
didDispose = false) and ref.onDispose(() => didDispose = true). - await Future.delayed(duration).
- If didDispose is true, the user triggered another refresh during the delay; throw to abort (Riverpod catches and ignores). Otherwise create the client, register onDispose(client.close), and run the request.
So: delay first, then create client and run request; disposal during the delay aborts, disposal after creates client cancels the request.
Reusable extension
You can implement an extension on Ref that returns a debounced/cancellable client:
- Use onDispose to set a "cancelled" flag.
- Wait for the debounce duration; if disposed, throw.
- Create the client, onDispose(client.close), return the client.
Use this extension in your activity/provider so all call sites get debounce + cancel behavior. See the official Riverpod "cancel" how-to for a full extension example.
From the file to a first result
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Claude Code
test -f '.skill-downloads/riverpod-request-cancellation-and-debouncing-mse7invy/SKILL.md' && test -s '.skill-downloads/riverpod-request-cancellation-and-debouncing-mse7invy/SKILL.md' && mkdir -p '.claude/skills' && test ! -e '.claude/skills/riverpod-cancel' && cp -R '.skill-downloads/riverpod-request-cancellation-and-debouncing-mse7invy' '.claude/skills/riverpod-cancel'Cursor
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