Mentioned, how to submit and reset a form on success using htmx:

<form hx-post="/admin/candidates"
           hx-target="#candidates_add_form"
           hx-swap="beforebegin"
           hx-on::after-request=" if(event.detail.successful) this.reset()"
  >

This assumes the last row is the add form, and places the newly added item directly above it.