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Learn ECMAScript

You're reading from   Learn ECMAScript Discover the latest ECMAScript features in order to write cleaner code and learn the fundamentals of JavaScript

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Product type Paperback
Published in Feb 2018
Publisher
ISBN-13 9781788620062
Length 298 pages
Edition 2nd Edition
Languages
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Authors (2):
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Narayan Prusty Narayan Prusty
Author Profile Icon Narayan Prusty
Narayan Prusty
MEHUL MOHAN MEHUL MOHAN
Author Profile Icon MEHUL MOHAN
MEHUL MOHAN
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Toc

Table of Contents (14) Chapters Close

Preface 1. Getting Started with ECMAScript FREE CHAPTER 2. Knowing Your Library 3. Using Iterators 4. Asynchronous Programming 5. Modular Programming 6. Implementing the Reflect API 7. Proxies 8. Classes 9. JavaScript on the Web 10. Storage APIs in JavaScript 11. Web and Service Workers 12. Shared Memory and Atomics 13. Other Books You May Enjoy

Working with shared workers


As discussed previously, shared workers are workers that multiple scripts can access, given that they follow the same origin policy (more on this in a later section named Same origin policy).

The API is a little different from dedicated workers, because these workers can be accessed by any script, so there's a need to manage all the connections via different ports baked into the SharedWorker object.

Setting up a shared worker

A shared worker can be created by calling the SharedWorker constructor and providing the name of the file as the argument:

const awesomeworker = new SharedWorker('myworker.js');

Here, we used the SharedWorker constructor to create an instance of a sharedworker object. Unlike with dedicated workers, you won't be able to see the HTTP network request in the browser made to the myworker.js file. This is important because the browser has to maintain only one instance of this file across multiple scripts calling this web worker:

// myworker.js
console...
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