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The TypeScript Workshop

The TypeScript Workshop

By : Ben Grynhaus , Jordan Hudgens , Rayon Hunte , Matt Morgan , Wekoslav Stefanovski
4.7 (19)
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The TypeScript Workshop

The TypeScript Workshop

4.7 (19)
By: Ben Grynhaus , Jordan Hudgens , Rayon Hunte , Matt Morgan , Wekoslav Stefanovski

Overview of this book

By learning TypeScript, you can start writing cleaner, more readable code that’s easier to understand and less likely to contain bugs. What’s not to like? It’s certainly an appealing prospect, but learning a new language can be challenging, and it’s not always easy to know where to begin. This book is the perfect place to start. It provides the ideal platform for JavaScript programmers to practice writing eloquent, productive TypeScript code. Unlike many theory-heavy books, The TypeScript Workshop balances clear explanations with opportunities for hands-on practice. You’ll quickly be up and running building functional websites, without having to wade through pages and pages of history and dull, dry fluff. Guided exercises clearly demonstrate how key concepts are used in the real world, and each chapter is rounded off with an activity that challenges you to apply your new knowledge in the context of a realistic scenario. Whether you’re a hobbyist eager to get cracking on your next project, or a professional developer looking to unlock your next promotion, pick up a copy and make a start! Whatever your motivation, by the end of this book, you’ll have the confidence and understanding to make it happen with TypeScript.
Table of Contents (16 chapters)
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Preface

Activity 7.01: Creating Decorators for Call Counting

As a developer of a backend service for a website, you are tasked with creating a solution that will enable the operations department to have clear auditing on the behavior of the service. For that, the app is required to have a tally of all class instantiations and method invocations.

In this activity, you're going to create class and method decorators that can be used to count class instantiations and method invocations. You will create a class that contains data about a person and use the decorators to count how many such objects were created and how many times each method was called. After you have constructed several objects and used their properties, take a look at the values of the counters.

The aim of this activity is to demonstrate the uses of class and method decorators in order to address a cross-cutting concern of your application, without changing the functionality of the given class. You should have...

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