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)

Other useful Svelte features

We've tried designing our journaling app to make use of most of the features of Svelte 3 that you're likely to adopt when building your own apps, but we could not fit them all in. The rest of this chapter will lightly touch on some more features of the Svelte compiler and runtime that might be useful to you.

Slots

Slots allow parents to pass markup to child components.

In the child component, define the place for a slot with the <slot>...</slot> syntax; you can optionally put some default (fallback) content inside.

An example of this can be seen in the following code snippet:

Child.svelte

<h1>Here's the child component</h1>
<div style="margin: 0 2em;">
    <slot>
        <p style="color: #999">This is the default              content &lt...