Baseline Widely available
Note: This feature is available in Web Workers.
The read-only signal property of the Request interface returns the AbortSignal associated with the request.
An AbortSignal object.
// Create a new abort controller
const controller = new AbortController();
// Create a request with this controller's AbortSignal object
const req = new Request("/", { signal: controller.signal });
// Add an event handler logging a message in case of abort
req.signal.addEventListener("abort", () => {
console.log("abort");
});
// In case of abort, log the AbortSignal reason, if any
fetch(req).catch(() => {
if (req.signal.aborted) {
if (req.signal.reason) {
console.log(`Request aborted with reason: ${req.signal.reason}`);
} else {
console.log("Request aborted but no reason was given.");
}
} else {
console.log("Request not aborted, but terminated abnormally.");
}
});
// Actually abort the request
controller.abort();
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