A hook for using web workers in React applications

Usage no npm install needed!

<script type="module">
  import shopifyReactWebWorker from 'https://cdn.skypack.dev/@shopify/react-web-worker';



Build Status Build Status License: MIT npm version npm bundle size (minified + gzip)

A hook for using web workers in React applications.


$ yarn add @shopify/react-web-worker


This package provides a useWorker hook to leverage web workers in React. For convenience, it also re-exports the entirety of @shopify/web-worker, so you only need to install this package to get access to those additional exports.


useWorker allows your React applications to take advantage of web workers provided by createWorkerFactory from @shopify/web-worker. This hook creates a web worker during render and terminates it when the component unmounts.

import React, {useEffect} from 'react';
import {Page} from '@shopify/polaris';
import {createWorkerFactory, useWorker} from '@shopify/react-web-worker';

// assume ./worker.ts contains
// export function hello(name) {
//  return `Hello, ${name}`;
// }

const createWorker = createWorkerFactory(() => import('./worker'));

function Home() {
  const worker = useWorker(createWorker);
  const [message, setMessage] = React.useState(null);

  useEffect(() => {
    (async () => {
      // Note: in your actual app code, make sure to check if Home
      // is still mounted before setting state asynchronously!
      const webWorkerMessage = await worker.hello('Tobi');
  }, [worker]);

  return <Page title="Home"> {message} </Page>;

You can optionally pass a second argument to useWorker, which will be used as the options to the worker creator function.