Using Web Workers with Angular CLI

Using Web Workers with Angular CLI

In this post, you'll learn how to use the Angular CLI to easily add Web Worker to your Angular apps

In this post, you'll learn how to use the Angular CLI to easily add Web Worker to your Angular apps

Web Workers allow you to run CPU intensive computations in a background thread, freeing the main thread to update the user interface.

If you find your application becomes unresponsive while processing data, using Web Workers can help.

Adding a Web Worker

You can add a web worker anywhere in your application. If the file that contains your expensive computation is src/app/app.component.ts, you can add a Web Worker using ng generate web-worker app.

Running this command will:

  • configure your project to use Web Workers, if it isn't already.
  • add src/app/app.worker.ts with scaffolded code to receive messages:
addEventListener('message', ({ data }) => {

  const response = `worker response to ${data}`;



add scaffolded code to src/app/app.component.ts to use the worker:

if (typeof Worker !== 'undefined') {

  // Create a new

  const worker = new Worker('./app.worker', { type: 'module' });

  worker.onmessage = ({ data }) => {

    console.log(`page got message: ${data}`);



} else {

  // Web Workers are not supported in this environment.

  // You should add a fallback so that your program still executes correctly.


After the initial scaffolding, you will need to refactor your code to use the Web Worker by sending messages to and from.


There are two important things to keep in mind when using Web Workers in Angular projects:

  • Some environments or platforms, like @angular/platform-server used in Server-side Rendering, don't support Web Workers. You have to provide a fallback mechanism to perform the computations that the worker would perform to ensure your application will work in these environments.
  • Running Angular itself in a Web Worker via @angular/platform-webworker is not yet supported in Angular CLI.

Web Development Services

Web Development Services

As one of the best Web Application Development Company, it provides a fine quality mobile app development service at an affordable price. Especially, it encourage start-ups that have unique ideas, by offering a more competitive price

HireFullStackDeveloperIndia is rated as one of the top Web Application Development Company in India by various industry magazines and review sites. They have a right blend of award-winning designers, expert programmers and Google certified digital marketers which make them a unique one-stop solution for hundreds of our clients, spread across all countries.

A Good website reflects not only your business but also it is one of the main factors why a potential customer would convert into Client. A good website design helps increase traffic driving leads to grow business. The best web design company create a custom design for each corporate website so as to help them meet their business goals.

Get Quote:

Web Development Services in USA

Web Development Services in USA

HireFullStackDeveloperIndia goal is to get the app downloaded millions of times, generate revenue and featured on app stores.

HireFullStackDeveloperIndia is a leading Web Application Development Company in USA that mission is simple: To help our clients see what they cannot see themselves. We work alongside elite brands to uncover what we believe to be simple truths: that all roads lead to web app. That they should dream bigger. And most importantly, that they’re underestimating how an amazing mobile experience can revolutionise the way they interact with their customers.

Visit us: What is the best Full Stack Development Company in Nevada, USA?

Mobile App Development Company India | Ecommerce Web Development Company India

Mobile App Development Company India | Ecommerce Web Development Company India

Best Mobile App Development Company India, WebClues Global is one of the leading web and mobile app development company. Our team offers complete IT solutions including Cross-Platform App Development, CMS & E-Commerce, and UI/UX Design.

We are custom eCommerce Development Company working with all types of industry verticals and providing them end-to-end solutions for their eCommerce store development.

Know more about Top E-Commerce Web Development Company