Book Image

Learning TypeScript 2.x - Second Edition

By : Remo H. Jansen
Book Image

Learning TypeScript 2.x - Second Edition

By: Remo H. Jansen

Overview of this book

TypeScript is an open source and cross-platform statically typed superset of JavaScript that compiles to plain JavaScript and runs in any browser or host. This book is a step-by-step guide that will take you through the use and benefits of TypeScript with the help of practical examples. You will start off by understanding the basics as well as the new features of TypeScript 2.x. Then, you will learn how to work with functions and asynchronous programming APIs. You will continue by learning how to resolve runtime issues and how to implement TypeScript applications using the Object-oriented programming (OOP) and functional programming (FP) paradigms. Later, you will automate your development workflow with the help of tools such as Webpack. Towards the end of this book, you will delve into some real-world scenarios by implementing some full-stack TypeScript applications with Node.js, React and Angular as well as how to optimize and test them. Finally, you will be introduced to the internal APIs of the TypeScript compiler, and you will learn how to create custom code analysis tools.
Table of Contents (17 chapters)

Working with MobX

MobX is a library that helps us to manage and mutate the state in a React application. In this section, we are going to understand the MobX architecture. We will also learn how to install and configure it, what its main components are, and its APIs.

Understanding the MobX architecture

The MobX architecture introduces an entity known as the Store. A Store is an object that contains some state and provides access to some actions that allow us to mutate its internal state:

  • The state is observable; this means that when its value changes, an event is emitted and other parts of the application can subscribe to state changes
  • The actions allow us to mutate the current state
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