Book Image

Real-World Svelte

By : Tan Li Hau
4.3 (4)
Book Image

Real-World Svelte

4.3 (4)
By: Tan Li Hau

Overview of this book

Svelte has quickly become a popular choice among developers seeking to build fast, responsive, and efficient web applications that are high-performing, scalable, and visually stunning. This book goes beyond the basics to help you thoroughly explore the core concepts that make Svelte stand out among other frameworks. You’ll begin by gaining a clear understanding of lifecycle functions, reusable hooks, and various styling options such as Tailwind CSS and CSS variables. Next, you’ll find out how to effectively manage the state, props, and bindings and explore component patterns for better organization. You’ll also discover how to create patterns using actions, demonstrate custom events, integrate vanilla JS UI libraries, and progressively enhance UI elements. As you advance, you’ll delve into state management with context and stores, implement custom stores, handle complex data, and manage states effectively, along with creating renderless components for specialized functionalities and learning animations with tweened and spring stores. The concluding chapters will help you focus on enhancing UI elements with transitions while covering accessibility considerations. By the end of this book, you’ll be equipped to unlock Svelte's full potential, build exceptional web applications, and deliver performant, responsive, and inclusive user experiences.
Table of Contents (22 chapters)
1
Part 1: Writing Svelte Components
6
Part 2: Actions
10
Part 3: Context and Stores
16
Part 4: Transitions

Example – progressively enhancing a form

A <form> element is a section of a document that can contain inputs that will be used to submit information.

By default, when you submit a form, the browser will navigate to a URL to process the form submission. This means that the user will lose the state they are in as they navigate away from the current page when they submit the form.

However, with the ability to make asynchronous requests through the browser fetch API, we can now submit data through API requests without leaving the current page, and stay where we are.

This means that if the site is playing music, video, or animation, they will still be playing while we make asynchronous API calls.

Our task now is to create an action to enhance the form element so that the enhanced form will not navigate to a new location, but rather submit the form data asynchronously.

For lack of a better name, I am going to call this enhancing action enhance.

Before we proceed...