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React 16 Essentials

You're reading from   React 16 Essentials A fast-paced, hands-on guide to designing and building scalable and maintainable web apps with React 16

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Product type Paperback
Published in Nov 2017
Publisher
ISBN-13 9781787126046
Length 240 pages
Edition 2nd Edition
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Authors (3):
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Christopher Pitt Christopher Pitt
Author Profile Icon Christopher Pitt
Christopher Pitt
Artemij Fedosejev Artemij Fedosejev
Author Profile Icon Artemij Fedosejev
Artemij Fedosejev
Adam Boduch Adam Boduch
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Adam Boduch
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Table of Contents (14) Chapters Close

Preface 1. What's New in React 16 FREE CHAPTER 2. Installing Powerful Tools for Your Project 3. Creating Your First React Element 4. Creating Your First React Component 5. Making Your React Components Reactive 6. Using Your React Components with Another Library 7. Updating Your React Components 8. Building Complex React Components 9. Testing Your React Application with Jest 10. Supercharging Your React Architecture with Flux 11. Preparing Your React Application for Painless Maintenance with Flux 12. Refining Your Flux Apps with Redux Index

Understanding the virtual DOM


Why do we need to manipulate the DOM in the first place? It is because our web applications are not static. They have a state represented by a user interface (UI) that a web browser renders, and that state can be changed when an event occurs. What kind of events are we talking about? There are two types of events that we're interested in:

  • User events: When a user types, clicks, scrolls, resizes, and so on

  • Server events: When an application receives data or an error from a server, among others

What happens while handling these events? Usually, we update the data that our application depends on and that data represents a state of our data model. In turn, when a state of our data model changes, we might want to reflect this change by updating a state of our UI. Looks like what we want is a way of syncing two different states: the UI state and data model state. We want one to react to the changes in the other and vice versa. How can we achieve this?

One of the ways...

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