async function processBatch(tasks) {
  const results = await Promise.allSettled(tasks.map(t => t()));
  const failures = results
    .filter(r => r.status === 'rejected')
    .map(r => r.reason);
 
  if (failures.length > 0) {
    throw new AggregateError(failures, 'Batch processing encountered errors');
  }
}
 
try {
  await processBatch(myTasks);
} catch (e) {
  if (e instanceof AggregateError) {
    for (const error of e.errors) console.error(error.message);
  }
}