Gain insights into reactive programming with RxJS. Learn about observables, operators, and concurrent programming to create real-world applications like a real-time earthquake visualizer and spaceship game.

_ Reactive Programming with RxJS by The Pragmatic Programmer_ .png

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In this course, you will learn about reactive programming techniques and use them to create real-world applications. Throughout this course, you will learn important concepts of RxJS programming such as observables, operators, concurrent programming, and how to build a complete web application.

Additionally, you will have the opportunity to build out applications for different real-world scenarios so that you can put what you learn into practice. You will use RxJS operators in scenarios such as the real-time earthquake visualizer and the reactive spaceship game.

By the end, you will have a new skill that you can utilize to build reactive programs as well as a few new projects to add to your portfolio.

Reactive Programming with RxJS

# Ideas for improvement

Besides being in urgent need of a better graphical design, our application could use some features to be more than a quick redirect to Wikipedia results:

1. Let the user bookmark particular results. We could add a little star next to every result in the list so that when the user clicks the star sign, it saves that result as a favorite. We could make the star into its own widget. Extra points if we use a persistent API (reactively!), such as Local Storage or IndexedDB, to enable a bookmark feature.

2. Show a “preview” of a result on the right side of the screen if the user clicks the link, alongside a synopsis and some meta information about it. We can provide a "Read More" link in it and implement it as a widget for when the user wants to go to the actual Wikipedia result.

# Wrapping up

Now we know how to develop web applications—that use modern techniques—without abandoning the reactive philosophy. This chapter provided us with an idea of how we could use Observables and RxJS as the internal engines of other frameworks or applications. By standing on the shoulders of Observables and the reactive way of life, we can greatly simplify web applications and reduce the state to its minimum expression, making our web applications less fragile and more maintainable.



Learn some of the better ways in which the MVI approach can be used.

Wrapping Up Model View Intent

Getting Started

Introduction to Reactive Programming with RxJS

Understanding the Reactiveness

Understanding the Observables

Understanding Sequencing and its Operators

Make a Real-time Earthquake Visualizer

Building Concurrent Programs Through Pipelines

RxJS Subject Class

Building a Reactive Spaceship to Keep the Application Pure

Building a Complete Web Application Using RxJS

Getting Real Time Updates from Twitter using Node.js

Schedulers

React Web Applications With Cycle.js and using Model View Intent

Closing Remarks

Wrapping Up Model View Intent

Ideas for improvement