Book Image

Svelte 3 Up and Running

By : Alessandro Segala
Book Image

Svelte 3 Up and Running

By: Alessandro Segala

Overview of this book

Svelte is a modern JavaScript framework used to build static web apps that are fast and lean, as well as being fun for developers to use. This book is a concise and practical introduction for those who are new to the Svelte framework which will have you up to speed with building apps quickly, and teach you how to use Svelte 3 to build apps that offer a great app user experience (UX). The book starts with an introduction to Svelte 3, before showing you how to set up your first complete application with the framework. Filled with code samples, each chapter will show you how to write components using the Svelte template syntax and the application programming interfaces (APIs) of the Svelte framework. As you advance, you’ll go from scaffolding your project and tool setup all the way through to production with DevOps principles such as automated testing, continuous integration, and continuous delivery (CI/CD). Finally, you’ll deploy your application in the cloud with object storage services and a content delivery network (CDN) for best-in-class performance for your users. By the end of this book, you’ll have learned how to build and deploy apps using Svelte 3 to solve real-world problems and deliver impressive results.
Table of Contents (9 chapters)

Chapter 3: Building Reactive Svelte Components

Svelte is more than a framework: it's also a compiler, and, according to its creator Rich Harris, even a language. In fact, Svelte "extends" both HTML and JavaScript, in a natural way that has been applauded by developers.

In the previous chapter, we set up our environment and scaffolded the Svelte project. We also got a glimpse of how Svelte components work.

In this chapter, we'll be building the various Svelte components that our journaling app uses. Just as when learning any other programming language, using Svelte requires getting acquainted with a new syntax, which we'll explore gradually by building each component.

In this chapter, we'll be covering the following topics:

  • Adding the required runtime dependencies and pre-made files that are specific to our journaling app
  • Exploring the templating syntax for Svelte components and how to manage reactivity in components
  • Using bindings...