Book Image

MobX Quick Start Guide

By : Pavan Podila, Michel Weststrate
Book Image

MobX Quick Start Guide

By: Pavan Podila, Michel Weststrate

Overview of this book

MobX is a simple and highly scalable state management library in JavaScript. Its abstractions can help you manage state in small to extremely large applications. However, if you are just starting out, it is essential to have a guide that can help you take the first steps. This book aims to be that guide that will equip you with the skills needed to use MobX and effectively handle the state management aspects of your application. You will first learn about observables, actions, and reactions: the core concepts of MobX. To see how MobX really shines and simplifies state management, you'll work through some real-world use cases. Building on these core concepts and use cases, you will learn about advanced MobX, its APIs, and libraries that extend MobX. By the end of this book, you will not only have a solid conceptual understanding of MobX, but also practical experience. You will gain the confidence to tackle many of the common state management problems in your own projects.
Table of Contents (17 chapters)
Title Page
Packt Upsell


The UI is the visual equivalent of data (the state) along with interactive controls to change that state. The UI fires actions, which leads to the change in state. Side effects are external operations that are triggered due to some state change. There are observers in the system that look out for certain state changes and perform the corresponding side effects.

The data flow triad of Action --> State --> UI, coupled with side effects, creates a simple mental model of the UI. MobX strongly adheres to this mental model and you can see that reflected in its API, with observables, actions, reactions, and observers. The simplicity of this API makes it easy to tackle some of the complex interactions in UI.

If you have used Redux before, you can see that MobX reduces the ceremony needed to cause a state change and handle side effects. MobX strives to provide a declarative and reactive API for state management without compromising on simplicity. Throughout this book, this philosophy of MobX will be explored, with a deeper look at its API and real-world use cases.

In the next chapter, we will dive into the world of MobX with a first hand look at its core building blocks.