Book Image

Mastering TypeScript 3 - Third Edition

By : Nathan Rozentals
Book Image

Mastering TypeScript 3 - Third Edition

By: Nathan Rozentals

Overview of this book

TypeScript is both a language and a set of tools to generate JavaScript. It was designed by Anders Hejlsberg at Microsoft to help developers write enterprise-scale JavaScript. Starting with an introduction to the TypeScript language, before moving on to basic concepts, each section builds on previous knowledge in an incremental and easy-to-understand way. Advanced and powerful language features are all covered, including asynchronous programming techniques, decorators, and generics. This book explores many modern JavaScript and TypeScript frameworks side by side in order for the reader to learn their respective strengths and weaknesses. It will also thoroughly explore unit and integration testing for each framework. Best-of-breed applications utilize well-known design patterns in order to be scalable, maintainable, and testable. This book explores some of these object-oriented techniques and patterns, and shows real-world implementations. By the end of the book, you will have built a comprehensive, end-to-end web application to show how TypeScript language features, design patterns, and industry best practices can be brought together in a real-world scenario.
Table of Contents (16 chapters)
Free Chapter
TypeScript Tools and Framework Options

Let's Get Our Hands Dirty

In this, our final chapter, we will use the techniques and principles that we have learned up to this point to build a sample web application. This application will use the left-to-right panel design that we explored in Chapter 11, Object-Oriented Programming, which uses the State and Mediator design pattern to control screen state. We will continue to interact with REST endpoints, as we discussed in Chapter 13, Building Applications. We will implement a fully working REST API using Express, that will read data from a backend database. We will then look at some new techniques for working with Observables that will allow us to combine data, filter data, and coordinate asynchronous requests to a REST API. We will also discuss and implement the Domain Events design pattern to help with communication between independent application components.

We already...