bandolier-template/admin/bando/demos/Form.svelte.md

This demonstrates how to use the FormField component to construct forms with nicer error messages. There are a lot of things you need to do for nice error messages on forms, and FormField handles most of them. You need to set variables for it, then place your input inside:

<FormField form={ form } field="subscribe" label="Want Notifications?">
  <input type="checkbox" id="subscribe" name="subscribe" bind:checked={ form.subscribe }>
</FormField>

All of the input fields work mostly the same but with Svelte you need to use bind:checked={ variable } instead of bind:value.