sveltekit-superforms

Superforms 💥

Making SvelteKit forms a pleasure to use!

https://superforms.rocks/
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Feature list

• Server- and client-side validation with your favorite validation libraries, and more to come: 💥 Arktype 💥 Joi 💥 TypeBox 💥 Valibot 💥 VineJS 💥 Yup 💥 Zod 💥
• Seamless merging of PageData and ActionData - Forget about which one to use and how, just focus on your form data.
• Auto-centering and focusing on invalid form fields.
• Tainted form detection, prevents the user from losing data if navigating away from an unsaved form. Or use snapshots to save the form state.
• Automatically coerces the FormData into correct types.
• For advanced data structures, forget about the limitations of FormData - Use nested data structures transparently.
• Generates default form values from validation schemas.
• Handles 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 validation for the best possible UX.
• Create loading spinners easily with three auto-updating timers, based on human perception research.
• Hook into a number of events for full control over the validation data and the ActionResult, with a possibility to cancel the update at every step.
• Complete customization with a huge list of options.
• No JavaScript required as default, but full support for progressive enhancement.
• Comes with a Super Debugging Svelte Component: SuperDebug.

Get started

Follow the Get started tutorial on the website to get a hands-on introduction to Superforms: https://superforms.rocks/get-started

You can also watch this excellent introduction video to see what's possible: https://www.youtube.com/watch?v=MiKzH3kcVfs

Help & support

• If you're using Superforms in non-profit circumstances, support is completely free; a star on Github is more than enough to show your appreciation. Join the #free-support channel on Discord and ask away!
• If you're making or aiming to make money on your project, a donation proportional to the current profit of the project or the company you work for, will give you a month of commercial support. Donate with one of the options on the website, then ask in the #commercial-support channel on Discord.

Contributing

General feedback, feature requests, bug reports, PR:s, are very welcome as a Github issue or on the Discord server!

Donating

If you appreciate the hard work behind Superforms, please support open source software with a donation.

Changelog

[2.9.0] - 2024-03-12

Added

• "SPA action mode", the SPA option can now take a string, corresponding to a form action, and it will post there, even without a html form on the page. Especially useful for debounced server checks like available usernames.

Fixed

• Fixed types for constraints, tainted and errors when using intersections and unions in schemas.
• Fixed SuperDebug collapsed height by preventing global css leak.
• Redirect in SPA mode cancelled normal redirects, preventing applyAction.
• Default objects sent to superForm returned a form with an empty id, causing collisions, it is now a random string.
• customValidity didn't clear without client-side validators.