Aspect ratio frames
Reserve media space to prevent unwanted layout shifts.
Live preview
16 : 9
Reserved visual surface
HTML
<figure class="xsh-aspect-frame">
<div>
<span>16 : 9</span>
<p>Reserved visual surface</p>
</div>
<figcaption>Responsive aspect-ratio container</figcaption>
</figure>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-aspect-frame | Used by the example markup and component styles or behavior. |
aspect-ratio | Used by the example markup and component styles or behavior. |
Accessibility & keyboard
This is a noninteractive presentation primitive.
Implementation note. Use intrinsic media sizes where known to avoid layout shift.
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.