Message banners
Present prominent nonblocking messages across a full page region.
Live preview
HTML
<div class="xsh-banner" role="status">
<div>
<strong>Scheduled maintenance</strong>
<p>Example notice · No maintenance is actually scheduled.</p>
</div>
<button class="xsh-button xsh-button--secondary xsh-button--sm" data-xsh-remove-parent=".xsh-banner" aria-label="Dismiss maintenance notice">Dismiss</button>
</div>Installation & markup
Include the local stylesheet and script once on the page, then place the component inside a data-xsh-ui root. The example above works without a build system.
<link rel="stylesheet" href="/dist/xshna-ui.css">
<div data-xsh-ui>
<!-- Add the HTML example above -->
</div>
<script defer src="/dist/xshna-ui.js"></script>Component API
Public classes, attributes and hooks used by this example. Keep the xsh- prefix intact.
| Identifier | Contract |
|---|---|
xsh-banner | Used by the example markup and component styles or behavior. |
data-xsh-remove-parent | Used by the example markup and component styles or behavior. |
Accessibility & keyboard
The dismiss button is keyboard-operable and removes only its own banner.
Implementation note. Do not use dismissal to hide safety-critical warnings permanently.
Interaction contract
Behavioral components use the shared delegated runtime; visual-only primitives rely on semantic HTML and CSS. Runtime controls emit bubbling xsh:* CustomEvents; bind application handlers to those events when server persistence, API data or navigation is required.