What background knowledge is necessary to enroll in this course?

Learners should have a basic understanding of JavaScript programming and general web development concepts. Familiarity with Node.js and browser-based JavaScript development will help learners follow along with the practical examples and hands-on exercises more effectively.

Who is this course for?

This course is designed for JavaScript developers, web developers, backend developers, and software engineers who want to deepen their understanding of concurrency, threading, and performance optimization in JavaScript applications.

Can I preview a course before enrolling?

Yes, you can preview the first video and view the syllabus before you enroll. You must purchase the course to access content not included in the preview.

When will I have access to the lectures and assignments?

If you decide to enroll in the course before the session start date, you will have access to all of the lecture videos and readings for the course. You’ll be able to submit assignments once the session starts.

What will I get when I enroll?

Once you enroll and your session begins, you will have access to all videos and other resources, including reading items and the course discussion forum. You’ll be able to view and submit practice assessments, and complete required graded assignments to earn a grade and a Course Certificate.

When will I receive my Course Certificate?

If you complete the course successfully, your electronic Course Certificate will be added to your Accomplishments page - from there, you can print your Course Certificate or add it to your LinkedIn profile.

Why can’t I audit this course?

This course is currently available only to learners who have paid or received financial aid, when available.

Is financial aid available?

Yes. In select learning programs, you can apply for financial aid or a scholarship if you can’t afford the enrollment fee. If fin aid or scholarship is available for your learning program selection, you’ll find a link to apply on the description page.

JavaScript Web Workers - A Practical Visual Guide 2026

Ce cours n'est pas disponible en Français (France)

Nous sommes actuellement en train de le traduire dans plus de langues.

JavaScript Web Workers - A Practical Visual Guide 2026

Instructeur : Packt - Course Instructors

Inclus avec En savoir plus

Demander à Coursera

4 modules

Obtenez un aperçu d'un sujet et apprenez les principes fondamentaux.

niveau Intermédiaire

Expérience recommandée

4 heures à compléter

Planning flexible

Apprenez à votre propre rythme

4 modules

Obtenez un aperçu d'un sujet et apprenez les principes fondamentaux.

niveau Intermédiaire

Expérience recommandée

4 heures à compléter

Planning flexible

Apprenez à votre propre rythme

Ce que vous apprendrez

Understand JavaScript runtime environments and how they affect code execution.
Set up web workers and manage tasks across threads in JavaScript.
Optimize application performance by using worker threads and monitoring CPU utilization.

Compétences que vous acquerrez

Catégorie : Javascript
Catégorie : OS Process Management
Catégorie : Server Side
Catégorie : Performance Testing
Catégorie : Management Consulting
Catégorie : Performance Tuning

Outils que vous découvrirez

Catégorie : Frontend Performance

Détails à connaître

Certificat partageable

Ajouter à votre profil LinkedIn

Récemment mis à jour !

juillet 2026

Évaluations

4 devoirs

Enseigné en Anglais

Découvrez comment les employés des entreprises prestigieuses maîtrisent des compétences recherchées

En savoir plus sur Coursera pour les affaires

logos de Petrobras, TATA, Danone, Capgemini, P&G et L'Oreal

Il y a 4 modules dans ce cours

This course features Coursera Coach!

A smarter way to learn with interactive, real-time conversations that help you test your knowledge, challenge assumptions, and deepen your understanding as you progress through the course. In this course, you’ll explore JavaScript runtime environments, the call stack, and how to handle synchronous operations. Learn about web workers and their role in improving concurrency, offloading tasks, and optimizing performance. Through hands-on examples, you'll set up web workers, manage tasks across threads, and monitor CPU utilization. You’ll also refactor code to ensure tasks are distributed evenly among workers, improving application performance. By the end, you'll understand how to use web workers to manage heavy tasks, enhance concurrency, and optimize your JavaScript applications effectively. This course is designed for JavaScript developers with basic programming knowledge. No prior experience with concurrency or web workers is needed. By the end of the course, you will be able to explain runtime environments, manage concurrency using web workers, and optimize application performance.

In this module, we will explore the fundamental JavaScript runtime environment, focusing on how it manages the execution of JavaScript code. You'll learn about the call stack and synchronous operations. We'll also discuss the challenges faced when a single call stack handles multiple tasks, providing insights into the architecture behind JavaScript execution.

Inclus

4 vidéos

In this module, we will introduce and explain key concepts like threads, cores, concurrency, and parallelism. We will also differentiate concurrency from parallelism, explaining their significance in optimizing code performance. By the end of this section, you'll gain an understanding of how and when to use concurrency and parallelism in your projects, along with insights on web workers.

Inclus

8 vidéos1 devoir

8 vidéosTotal 35 minutes

Section Introduction3 minutes
What are threads?3 minutes
Threads run on CPU cores4 minutes
Concurrency intro3 minutes
Concurrency an action5 minutes
Parallelism4 minutes
When to use (and NOT to use) web workers3 minutes
Wrapping up with understanding our section example9 minutes

1 devoirTotal 15 minutes

Threads, Cores, Concurrency, and Parallelism15 minutes

In this module, we will dive into web workers, explaining how they function independently from the main thread to handle concurrent tasks. You will learn how to set up a web worker, pass data between threads, and optimize performance. Additionally, we'll explore creating worker threads in Node.js for more advanced concurrency management and demonstrate real-world examples.

Inclus

12 vidéos1 devoir

12 vidéosTotal 65 minutes

Intro to Web Workers and how they work5 minutes
Setting up a Web Worker8 minutes
Web Workers and the main thread do not share the same variables3 minutes
Sending a message from the main thread to the worker with postMessage5 minutes
Performing a task in the worker4 minutes
Closing a web worker, and project files4 minutes
Setting up a Node server project to run heavy tasks8 minutes
Viewing CPU utilization when running a Node task2 minutes
Creating a worker in Node, using the worker_threads module6 minutes
Refactoring code, creating a dynamic run function and allocating tasks evenly9 minutes
Completing our JavaScript code and sending each worker a task to perform5 minutes
Testing code, and seeing the full power of workers!6 minutes

1 devoirTotal 15 minutes

Web Workers (and yes, worker threads)15 minutes

In this module, we will wrap up the course, revisiting the core concepts you've learned about JavaScript runtime, web workers, and concurrency. This final section will help you consolidate your knowledge and understand how to apply it effectively in future JavaScript projects.

Inclus

1 vidéo2 devoirs

Instructeur

Packt - Course Instructors

Packt

2 090 Cours618 495 apprenants

Offert par

Packt

En savoir plus sur Software Development

Packt
JavaScript in Modern Web Development
Cours
Statut : Essai gratuit
Packt
JavaScript Masterclass - Zero To Job Ready With 10 Projects
Spécialisation
Statut : Essai gratuit
Packt
JavaScript Essentials 2026 - Quickstart Guide for Beginners
Cours
Packt
JavaScript Essentials: From Basics to DOM
Cours
Statut : Essai gratuit

Pour quelles raisons les étudiants sur Coursera nous choisissent-ils pour leur carrière ?

Felipe M.

Étudiant(e) depuis 2018

’Pouvoir suivre des cours à mon rythme à été une expérience extraordinaire. Je peux apprendre chaque fois que mon emploi du temps me le permet et en fonction de mon humeur.’

Jennifer J.

Étudiant(e) depuis 2020

’J'ai directement appliqué les concepts et les compétences que j'ai appris de mes cours à un nouveau projet passionnant au travail.’

Larry W.

Étudiant(e) depuis 2021

’Lorsque j'ai besoin de cours sur des sujets que mon université ne propose pas, Coursera est l'un des meilleurs endroits où se rendre.’

Chaitanya A.

’Apprendre, ce n'est pas seulement s'améliorer dans son travail : c'est bien plus que cela. Coursera me permet d'apprendre sans limites.’

Débloquez l'accès à plus de 10 000 cours grâce à un abonnement
Faites progresser votre carrière avec un diplôme en ligne
Obtenez un diplôme auprès d’universités de renommée mondiale - 100 % en ligne
Rejoignez les 4 700 entreprises internationales qui ont choisi Coursera for Business.

Foire Aux Questions

JavaScript concurrency refers to the ability to manage multiple tasks efficiently without blocking the main execution thread. It is highly relevant for modern web and server-side applications because it helps improve responsiveness, optimize performance, and handle computationally intensive operations more effectively.

This course focuses on the JavaScript runtime environment, the call stack, concurrency, parallelism, and the use of web workers in browser and Node.js environments. It provides practical guidance on setting up and managing worker threads, understanding CPU utilization, and improving application performance.

After completing this course, you will understand how the JavaScript runtime environment works and how synchronous execution impacts performance. You will be able to implement concurrency and parallelism using web workers and Node.js worker threads, optimize application responsiveness, and manage heavy computational tasks efficiently.