Request Cancellation
Request cancellation says that unfinished client work is no longer needed. Supported APIs receive an abort signal.
Another example
A person changes a search from cats to coats. The cats request is aborted before coats results appear.
Main parts
- 01Controller
- 02Abort signal
- 03Supported task
- 04Cancellation reason
- 05Quiet UI cleanup
Use it when
Cancel when navigation, a new query, or cleanup makes an old result useless.
Do not use it when
Stopping a browser request does not undo work the server already received.
Name used in code
AbortController -> signal -> fetch -> AbortError Before you ship
Check the runtime and version, integration limits, dependencies and licenses, and platform support. Verify security, failure, speed, monitoring, deploy, support owner, upgrade path, and rollback.
Outcome: Use or review Request Cancellation as a technical building block that the team can maintain. User context: A person changes a search from cats to coats. The cats request is aborted before coats results appear. Technology or engineering concept: Request Cancellation. Why it fits: Cancel when navigation, a new query, or cleanup makes an old result useless. Do not use it when: Stopping a browser request does not undo work the server already received. Engineering fit: Define where it runs and which version to use. Set its job, interfaces, data flow, dependencies, supported systems, security, and speed limits. Explain how it fits the current stack. Lifecycle safeguards: Check dependency health and licenses. Add monitoring and a fallback. Name the upgrade owner. Do not add a second tool for the same job without a measured benefit. Acceptance criteria: A small integration proves the needed behavior. Test compatibility, security, failure, and performance. Document deploy, upgrade, support, and rollback steps. Evidence and limits (evidence boundary): The standard covers only the listed scope. It does not choose the visual style, product decision, or Vibulary example. Unknowns to confirm: Current stack, runtime and version rules, target systems, dependency owner, performance budget, support period, and migration limits.
Check this request
Review the current use of Request Cancellation. Definition: Request cancellation says that unfinished client work is no longer needed. Supported APIs receive an abort signal. Release checks: Check the runtime and version, integration limits, dependencies and licenses, and platform support. Verify security, failure, speed, monitoring, deploy, support owner, upgrade path, and rollback. Before changing code, report the evidence you found, gaps, severity, and the smallest safe fix.