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)

Tools for testing

We will be using two primary tools for writing our test cases: Jasmine and Karma. Because we created our application using the Angular CLI, the CLI already adds these dependencies to our solution. The Angular CLI also creates sample test for our application including services and components, which include the initial setup work required to start writing the test. This is very useful for us because we avoid doing the setup work, and can therefore be more productive on what matters most: writing the test for our application.

Though we already have these (Jasmine and Karma) installed in our application, it would be good to look at these tools in isolation and understand them, so that if you would want to develop an application without the Angular CLI, you can use these tools.

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