---
title: "Feature: Form showcase"
manual: "Frontend Theme for Extension Development"
version: "main"
source: "Changelog/2.0/Feature-FormShowcase.rst"
modified: "2026-09-17T04:52:50+00:00"
---

# Feature: Form showcase

## Description

A new backend layout, **Form showcase**, renders a complete request
form built from the form components of the theme - fieldsets, every common
control, input groups, choice groups, a switch - followed by the same form as
it comes back after a failed submission, with an error summary linking to each
invalid field, and by the summary of a successful one.

The seeded demo tree carries it as `/forms`, next to `/styleguide` and,
like it, hidden from the navigation. The start page of the tree links to both.

Like the styleguide, the page ignores content an editor places on it: the
layout offers one column, and nothing renders it.

## The forms send nothing

Pressing a submit button runs the browser's own validation, so a field that is
required or wrongly formatted is marked the way a real form marks it. The
submission then ends in the browser: the forms use the `dialog` method
outside of a dialog, which sends no request and leaves the page where it is.

## Impact

A site package can select the layout for a page of its own to look at its
form styling in the appearance and palette it uses.