Our great sponsors
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Superforms
Superforms is a SvelteKit library that helps you with server-side validation and client-side display of forms.
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SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
For the examples, I'll be using zod for both React and Svelte, but won't be using libraries for the sake of showing the differences. You should be able to use any other validation libraries you want with no problem, but since I'm more familiar with zod, that's what I'm goin to be using. It's good to know that I'll only handle validations on the server-side, that's why it's useless for us to save some variables state in Svelte.
There are libraries for handling form submissions with builtin integrations for validations libraries, like react-hook-form with @hookform/resolvers for React, and we have superforms for SvelteKit, that handles validation with zod, they both are made for the same purpose.
There are libraries for handling form submissions with builtin integrations for validations libraries, like react-hook-form with @hookform/resolvers for React, and we have superforms for SvelteKit, that handles validation with zod, they both are made for the same purpose.