Sveltekit Superforms

Overview

Superforms is a library that aims to make validation and displaying of forms in SvelteKit more user-friendly and efficient. It provides several features such as seamless merging of PageData and ActionData, server- and client-side data validation using Zod, auto-centering and auto-focusing on invalid form fields, and tainted form detection to prevent data loss. The library also offers support for nested data structures, multiple forms on the same page, and works both on the server and with single-page applications (SPA). Superforms can be easily customized and comes with a Super Debugging Svelte Component.

Features

• Seamless merging of PageData and ActionData
• Server- and client-side data validation using Zod
• Auto-centering and auto-focusing on invalid form fields
• Tainted form detection to prevent data loss
• No JS required as default, but full support for progressive enhancement
• Automatic coercion of string data from FormData into correct types
• Support for sending forms as devalued JSON
• Generates default form values from validation schemas
• Support for nested data structures, snapshots, and multiple forms on the same page
• Works both on the server and with single-page applications (SPA)
• Proxy objects for handling data conversions to string and back again
• Realtime client-side validators for immediate user feedback
• Create loading spinners easily with three auto-updating timers
• Prevents form data loss by preventing error page rendering as default
• Hook into a number of events for full control over validation data and the ActionResult
• Complete customization with a wide list of options
• Comes with a Super Debugging Svelte Component: SuperDebug

Installation

To get started with Superforms, you can follow the tutorial on the website: https://superforms.rocks/get-started. Additionally, you can watch an introduction video to see what’s possible: https://www.youtube.com/watch?v=MiKzH3kcVfs.

Summary

Superforms is a powerful library that simplifies the process of validation and displaying forms in SvelteKit. It offers a range of features such as seamless data merging, data validation using Zod, automatic handling of form fields, prevention of data loss, and more. With its support for customization and a debugging component, Superforms provides a user-friendly solution for managing forms in SvelteKit applications.