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

Modular code

So far, our application has all of its HTML, CSS, and business logic as part of the AppComponent class. Although we have already broken this class down into separate app.component.html and app.component.css files, it really contains a number of separate components all in one. Let's take this opportunity to modularize our code, and create three separate classes. These three separate classes will be, as follows:

  • A NavbarComponent class to render and handle the navigation bar at the top of the screen.
  • A SideNavComponent class to render the left-hand side navigation panel.
  • A RightScreenComponent to handle the detail panel that slides in from the right.

This means that the AppComponent class becomes the central application class, and it will be responsible for coordinating each of these components.