Mastering Immutable.js: Better JavaScript development using immutable data

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Creating Immutable Data

The starting point of writing any Immutable.js code is to create an immutable collection. In this chapter, that's just what we'll do. There are a number of ways to create immutable collections, and you'll learn what they are and when they are appropriate to use. Specifically, we'll look at the following:

Using Immutable.js constructors
Using utility functions to create collections
Parsing JavaScript types into Immutable.js collections

Key benefits

• Master the Immutable.js JavaScript framework

• Build predictable and dependable applications using immutability

• Control how data flows through your application

• Control the effects of data flow in your user interface using Node.js

Description

Immutable.js is a JavaScript library that will improve the robustness and dependability of your larger JavaScript projects. All aspects of the Immutable.js framework are covered in this book, and common JavaScript situations are examined in a hands-on way so that you gain practical experience using Immutable.js that you can apply across your own JavaScript projects. The key to building robust JavaScript applications using immutability is to control how data flows through your application, and how the side-effects of these flows are managed. Many problems that are difficult to pinpoint in large codebases stem from data that’s been mutated where it shouldn’t have been. With immutable data, you rule out an entire class of bugs. Mastering Immutable.js takes a practical, hands-on approach throughout, and shows you the ins and outs of the Immutable.js framework so that you can confidently build successful and dependable JavaScript projects.

What you will learn

• Learn how Immutable.js can improve the dependability of your JavaScript code

• Discover how to create Immutable data, and work with persistent changes

• See how to combine and filter collections, and find items

• Learn how to work with sequences and side effects

• Sort collections, maps, and sets

• Get to know tricks to avoid processing chains

• Compare and move between lists, sets, and maps

• Work with Immutable patterns and Immutable architecture

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