Foundation and layout

AppShell

Full-height application shell with a sticky-footer main region.

Live example

Header

Main content grows

Usage

Each example includes the complete adapter-specific parameter reference. Copy it as a starting point, then remove options your use case does not need.

React

import { AppShell } from "@cofob/design-system-react";

/**
 * Complete AppShell parameter reference.
 * @param children
 *   type: ReactNode | Svelte Snippet | child HTML
 *   default: —
 *   example: children / snippet / child HTML
 * @param div attributes
 *   type: native element attributes
 *   default: —
 *   example: class / style / aria-* / data-*
 */
export function AppShellExample() {
  return (
    <AppShell><Header /><main>Content</main><Footer /></AppShell>
  );
}

Svelte

<script lang="ts">
  import { AppShell } from "@cofob/design-system-svelte";

  // Complete AppShell parameter reference.
  // children
  //   type: ReactNode | Svelte Snippet | child HTML
  //   default: —
  //   example: children / snippet / child HTML
  // div attributes
  //   type: native element attributes
  //   default: —
  //   example: class / style / aria-* / data-*
</script>

<AppShell><Header /><main>Content</main><Footer /></AppShell>

HTML

<!--
  Complete AppShell parameter reference.
  children
    type: ReactNode | Svelte Snippet | child HTML
    default: —
    example: children / snippet / child HTML
  div attributes
    type: native element attributes
    default: —
    example: class / style / aria-* / data-*
-->
<div class="cf-app-shell"><header>…</header><main>…</main><footer>…</footer></div>

Contract

CSS selector	`.cf-app-shell`
Adapters	Native · React · Svelte
Primary props	children · div attributes
Documented states	short content · sticky footer · overflowing content
Interaction	Static and SSR-safe
Theme	Semantic light and dark tokens

Composition

Native attributes and framework props are forwarded. Add custom classes without replacing the semantic contract.

Parameters

Adapter differences are explicit. Native element attributes are forwarded in React and Svelte and can be written directly in HTML.

Parameter	Type	Default	Adapters	Example	Description
`children`	`ReactNode \| Svelte Snippet \| child HTML`	`—`	React · Svelte · HTML	`children / snippet / child HTML`	Idiomatic adapter composition content.
`div attributes`	`native element attributes`	`—`	React · Svelte · HTML	`class / style / aria-* / data-*`	Forwards native class/style, accessibility, event, and data attributes to the root element.