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The JavaScript Workshop

You're reading from   The JavaScript Workshop Learn to develop interactive web applications with clean and maintainable JavaScript code

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Product type Paperback
Published in Nov 2019
Publisher Packt
ISBN-13 9781838641917
Length 802 pages
Edition 1st Edition
Languages
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Authors (8):
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Jahred Love Jahred Love
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Jahred Love
Alonzo L. Hosford Alonzo L. Hosford
Author Profile Icon Alonzo L. Hosford
Alonzo L. Hosford
Florian Sloot Florian Sloot
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Florian Sloot
Daniel Rosenbaum Daniel Rosenbaum
Author Profile Icon Daniel Rosenbaum
Daniel Rosenbaum
Philip Kirkbride Philip Kirkbride
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Philip Kirkbride
Nick Turner Nick Turner
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Nick Turner
Gaurav Mehla Gaurav Mehla
Author Profile Icon Gaurav Mehla
Gaurav Mehla
Joseph Labrecque Joseph Labrecque
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Joseph Labrecque
+4 more Show less
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Toc

Table of Contents (17) Chapters Close

Preface 1. Getting to Know JavaScript 2. Working with JavaScript FREE CHAPTER 3. Programming Fundamentals 4. JavaScript Libraries and Frameworks 5. Beyond the Fundamentals 6. Understanding Core Concepts 7. Popping the Hood 8. Browser APIs 9. Working with Node.js 10. Accessing External Resources 11. Creating Clean and Maintainable Code 12. Using NextGeneration JavaScript 13. JavaScript Programming Paradigms 14. Understanding Functional Programming 15. Asynchronous Tasks Appendix

AJAX

AJAX stands for Asynchronous JavaScript and XML and is an umbrella term for a set of technologies to communicate with servers and other sites in various formats, including JSON and XML.

Most JavaScript is synchronous, which means there is only a single thread of execution, and only one operation can be executed at a time. If browsers were truly synchronous, websites would be a drag to use, as only one resource would be able to load at a time. Imagine if the images on websites only drew one at a time after loading! Sometimes, requests can take a long time, such as to do a calculation or a complex database query. You wouldn't want your site to become non-responsive while a request is processing!

Luckily, service calls were designed to allow multiple calls to occur asynchronously. Also, in between requests being made and a response is received, the main thread of execution can continue to execute and potentially issue more service calls. This is the "A" in AJAX...

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