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Mastering Immutable.js

You're reading from   Mastering Immutable.js Better JavaScript development using immutable data

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Product type Paperback
Published in Sep 2017
Publisher Packt
ISBN-13 9781788395113
Length 216 pages
Edition 1st Edition
Languages
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Author (1):
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Adam Boduch Adam Boduch
Author Profile Icon Adam Boduch
Adam Boduch
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Toc

Table of Contents (17) Chapters Close

Preface 1. Why Immutable.js? FREE CHAPTER 2. Creating Immutable Data 3. Persistent Changes 4. Filtering Collections and Finding Items 5. Sequences and Side-Effects 6. Sorting Collections 7. Mapping and Reducing 8. Zipping and Flattening 9. Persistent Change Detection 10. Working with Sets 11. Comparing Collections 12. Combining Collections 13. Declarative Decision Making 14. Side-Effects in User Interfaces 15. Side-Effects in Node.js 16. Immutable Architecture

Initial application state

We'll start refactoring our application by thinking about the initial state of it. This will help us figure out how to break the whole state down into parts that can be mutated individually. We'll also add a new feature to this version of the app that allows the user to add new episodes. Here's what this part of the UI looks like:

Another new feature that we'll add to this version of the app is displaying the number of results beside the header:

As the filter controls change, and as new episodes are added, this number will change. Apart from these two changes, the functionality stays the same.

Result state

The first piece of state that we'll look at is the episode search...

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