Book Image

Advanced TypeScript Programming Projects

By : Peter O'Hanlon
Book Image

Advanced TypeScript Programming Projects

By: Peter O'Hanlon

Overview of this book

With the demand for ever more complex websites, the need to write robust, standard-compliant JavaScript has never been greater. TypeScript is modern JavaScript with the support of a first-class type system, which makes it simpler to write complex web systems. With this book, you’ll explore core concepts and learn by building a series of websites and TypeScript apps. You’ll start with an introduction to TypeScript features that are often overlooked in other books, before moving on to creating a simple markdown parser. You’ll then explore React and get up to speed with creating a client-side contacts manager. Next, the book will help you discover the Angular framework and use the MEAN stack to create a photo gallery. Later sections will assist you in creating a GraphQL Angular Todo app and then writing a Socket.IO chatroom. The book will also lead you through developing your final Angular project which is a mapping app. As you progress, you’ll gain insights into React with Docker and microservices. You’ll even focus on how to build an image classification program with machine learning using TensorFlow. Finally, you’ll learn to combine TypeScript and C# to create an ASP.NET Core-based music library app. By the end of this book, you’ll be able to confidently use TypeScript 3.0 and different JavaScript frameworks to build high-quality apps.
Table of Contents (13 chapters)

Enhancements

The Create method has a potential problem in that it assumes that it succeeds immediately. It does not handle the success event for the operation. Additionally, there is a further issue in that add operations have a complete event because the success event may fire before the record has been successfully written to the disk, and, if the transaction fails, the complete event is not raised. You can convert the Create method so that it uses a promise and resumes processing when the success event is raised. Then, update the insert portion of the component to reload once this has been completed.

The deletion resets the state even if the user wasn't editing the record that was deleted. So, enhance the delete code to only reset the state if the record being edited is the same as the one that was deleted.