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)

Bindings and events

Let's work on another feature of the app: the form to add new content.

AddForm.svelte component

This is yet another long component, so I recommend copying and pasting it from the ch3 folder inside the GitHub repository. The path to the code is src/components/AddForm.svelte, and you should place that in a file at the same location in your project.

The AddForm component renders a form that, when submitted, invokes a handler that sends the data to the API server. The API server stores the journal entry and responds with a JSON object containing the ID of the newly created object.

Let's highlight some snippets from that file (most HTML tags and elements' class attributes have been removed for clarity), as follows:

src/components/AddForm.svelte (fragment)

<form on:submit|preventDefault={submit}>
    <input type="text" bind:value={title} />
    <textarea bind:value={content...