Packt

JavaScript Web Workers - A Practical Visual Guide 2026

Packt

JavaScript Web Workers - A Practical Visual Guide 2026

Packt - Course Instructors

Instructor: Packt - Course Instructors

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Gain insight into a topic and learn the fundamentals.
Intermediate level

Recommended experience

4 hours to complete
Flexible schedule
Learn at your own pace
Gain insight into a topic and learn the fundamentals.
Intermediate level

Recommended experience

4 hours to complete
Flexible schedule
Learn at your own pace

What you'll learn

  • 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.

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Recently updated!

July 2026

Assessments

4 assignments

Taught in English

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There are 4 modules in this course

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.

What's included

4 videos

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.

What's included

8 videos1 assignment

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.

What's included

12 videos1 assignment

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.

What's included

1 video2 assignments

Instructor

Packt - Course Instructors
Packt
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