Example of doing a typically async action as synchronous with reduce() or async/await.

AsyncSyncPatterns.js

const itemIds = [1,2,3,4,5,6];

// Using reduce
itemIds.reduce((promise, id) => {
  return promise.then(_ => api.deleteItem(id));
}, Promise.resolve());

// Using Async/Await
itemIds.forEach(async (item) => {
  await api.deleteItem(item);
});