Q9: How is AbortController used to cancel asynchronous operations in Node.js?
AbortController and AbortSignal are web standard APIs built into modern Node.js to gracefully cancel ongoing asynchronous operations (such as fetch HTTP requests, event listeners, file streams, or timers). Passing an AbortSignal to asynchronous APIs allows calling controller.abort() from anywhere in the code to reject pending promises immediately and release underlying resources.
Key Takeaways
AbortControllerprovides a standardized mechanism to cancel active asynchronous tasks.- Supported natively across Node.js core modules like
fs,http,events, andtimers.
Knowledge Check
What property of AbortController is passed to asynchronous APIs to listen for cancellation events?