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)

Creating a chat room application using Socket.IO, Angular, and Auth0

Before we start with our development, we should figure out what we want to build. Since a chat room is a common enough application, it is easy for us to come up with a standard set of requirements that will help us exercise the different aspects of Socket.IO. The requirements for the application we are going to build are as follows:

  • A user will be able to send a message to be seen by all users in a general chat page
  • The user will be able to log in to the application, at which point a secure page will be available
  • Logged-in users will be able to send messages that are visible only to other logged-in users
  • Old messages will be retrieved and displayed to the user when they connect

Creating our application

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