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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

Application of Multiple Decorators on a Single Target

It is often necessary to apply more than one decorator on a single target. And as decorators can (and do) change the code that actually gets executed, it's important to have an understanding of how different decorators play together.

Basically, decorators are functions, and you're using them to compose your targets. This means that, in essence, decorators will be applied and executed bottom-up, with the decorator that's closest to the target going first and providing the result for the second decorators, and so on. This is similar to functional composition; that is, when we're trying to calculate f(g(x)), first the g function will be called, and then the f function will be called.

There is a small catch when using decorator factories, though. The composition rule only applies to the decorators themselves – and decorator factories are not decorators per se. They are functions that need to be...

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