Book Image

TypeScript 2.x By Example

By : Sachin Ohri
Book Image

TypeScript 2.x By Example

By: Sachin Ohri

Overview of this book

The TypeScript language, compiler, and open source development toolset brings JavaScript development up to the enterprise level. It allows you to use ES5, ES6, and ES7 JavaScript language features today, including classes, interfaces, generics, modules, and more. Its simple typing syntax enables building large, robust applications using object-oriented techniques and industry-standard design principles. This book aims at teaching you how to get up and running with TypeScript development in the most practical way possible. Taking you through two exciting projects built from scratch, you will learn the basics of TypeScript, before progressing to functions, generics, promises, and callbacks. Then, you’ll get to implement object-oriented programming as well as optimize your applications with effective memory management. You’ll also learn to test and secure your applications, before deploying them. Starting with a basic SPA built using Angular, you will progress on to building, maybe, a Chat application or a cool application. You’ll also learn how to use NativeScript to build a cool mobile application. Each of these applications with be explained in detail, allowing you to grasp the concepts fast. By the end of this book, you will have not only built two amazing projects but you will also have the skills necessary to take your development to the next level.
Table of Contents (11 chapters)

Trello - Adding Features

We have divided our sample Trello application into three parts: in the first one, covered in Chapter 5, Application 2 - Trello, we handled the basic flow with features such as data communication between components and TypeScript modules, and reached a stage where we had a homepage and board page that would display the data.

Our focus in this chapter will be on implementing all the remaining functionalities of our application, such as allowing the user to add a new task and subtask and change the data via HTTP instead of our current hardcoded method.

We will be covering the following topics in this chapter:

  • We will start by looking at what iterators are and how they are implemented in TypeScript
  • We will focus on async programming and the options available to us for writing async code
  • We will look at how Angular uses TypeScript to provide us with the...