better-worker

index.js

import BetterWorker from 'better-worker';

const bgSort = new BetterWorker((threads) => {
  return threads.sort((threadA, threadB) => {
    return threadA.id > threadB.id ? 1 : -1;
  });
});

// Using the worker-ified function:

const threads = [{ id: 1 }, { id: 2 }];
bgSort(threads).then(sortedThreads => {
  // Depending on the browser, sortedThreads was run in a background worker!
});

options.js

import BetterWorker from 'better-worker';

const lazyUpdate = new BetterWorker(() => {
  // Do something we don't really care about...
}, {
  // Workers have serialization costs that block the main thread, so a very low priority
  // update can be deferred until the browser isn't doing anything.
  priority: 'low',
  // If workers aren't available, then don't bother running this:
  inline: 'never',
});

lazyUpdate().then(() => {
  // Lazy update occured
});