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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
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2. Declaration Files
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5. Interfaces and Inheritance
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6. Advanced Types
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8. Dependency Injection in TypeScript
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9. Generics and Conditional Types
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11. Higher-Order Functions and Callbacks
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Working with Databases

It is very common for Node.js applications to work with a backend database such as mysql or postgres. It is critical that queries against a database be made asynchronously. Production-grade Node.js web services may serve thousands of requests per second. If it were necessary to pause the main execution thread for queries made synchronously against a database, these services just wouldn't scale at all. Asynchronous execution is critical to making this work.

The process of negotiating a database connection, sending a SQL string, and parsing the response is complicated and not a native feature of Node.js and so we will almost always use a third-party library to manage this. These libraries are guaranteed to implement some kind of callback or promise pattern and we'll see it throughout their documentation and examples. Depending on the library you choose, you may have to implement a callback pattern, you may get to work with promises, or you may be presented...

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