events: propagate abortsignal reason in new AbortError constructor in events

Signed-off-by: James M Snell <jasnell@gmail.com>

Author: jasnell

lib/events.js

@@ -810,7 +810,7 @@ async function once(emitter, name, options = {}) {
  const signal = options?.signal;
  validateAbortSignal(signal, 'options.signal');
  if (signal?.aborted)
- throw new AbortError();
+ throw new AbortError(undefined, { cause: signal?.reason });
  return new Promise((resolve, reject) => {
  const errorListener = (err) => {
  emitter.removeListener(name, resolver);
@@ -835,7 +835,7 @@ async function once(emitter, name, options = {}) {
  function abortListener() {
  eventTargetAgnosticRemoveListener(emitter, name, resolver);
  eventTargetAgnosticRemoveListener(emitter, 'error', errorListener);
- reject(new AbortError());
+ reject(new AbortError(undefined, { cause: signal?.reason }));
  }
  if (signal != null) {
  eventTargetAgnosticAddListener(
@@ -888,7 +888,7 @@ function on(emitter, event, options) {
  const signal = options?.signal;
  validateAbortSignal(signal, 'options.signal');
  if (signal?.aborted)
- throw new AbortError();
+ throw new AbortError(undefined, { cause: signal?.reason });
 
  const unconsumedEvents = [];
  const unconsumedPromises = [];
@@ -976,7 +976,7 @@ function on(emitter, event, options) {
  return iterator;
 
  function abortListener() {
- errorHandler(new AbortError());
+ errorHandler(new AbortError(undefined, { cause: signal?.reason }));
  }
 
  function eventHandler(...args) {