Book Image

Learn TypeScript 3 by Building Web Applications

By : Sebastien Dubois, Alexis Georges
Book Image

Learn TypeScript 3 by Building Web Applications

By: Sebastien Dubois, Alexis Georges

Overview of this book

TypeScript is a superset of the JavaScript programming language, giving developers a tool to help them write faster, cleaner JavaScript. With the help of its powerful static type system and other powerful tools and techniques it allows developers to write modern JavaScript applications. This book is a practical guide to learn the TypeScript programming language. It covers from the very basics to the more advanced concepts, while explaining many design patterns, techniques, frameworks, libraries and tools along the way. You will also learn a ton about modern web frameworks like Angular, Vue.js and React, and you will build cool web applications using those. This book also covers modern front-end development tooling such as Node.js, npm, yarn, Webpack, Parcel, Jest, and many others. Throughout the book, you will also discover and make use of the most recent additions of the language introduced by TypeScript 3 such as new types enforcing explicit checks, flexible and scalable ways of project structuring, and many more breaking changes. By the end of this book, you will be ready to use TypeScript in your own projects and will also have a concrete view of the current frontend software development landscape.
Table of Contents (15 chapters)

Creating and using the songs list component

For now, we have simply displayed the list of songs within the Home view, but this isn't great. We should actually create a dedicated component to do that. What we actually want is a component that we can pass the list of songs to, which will render it nicely and let us know when a selection has been made in that list.

Here are the specifications for the SongsList component:

  • Accept an array of Song objects as input.
  • Accept a loading state boolean as input (which will be used to render the loading indicator when needed).
  • Display the provided list of songs; each item should be clickable.
  • Emit an event whenever a song in the list has been clicked upon; attach the corresponding Song object to the event.

In the Home view, we will later implement an event handler for the song selection event.

Create the component file, src/components...