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svelte/site/content/tutorial/14-composition/02-slot-fallbacks/text.md

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---
title: Slot fallbacks
---
A component can specify *fallbacks* for any slots that are left empty, by putting content inside the `<slot>` element:
```html
<div class="box">
<slot>
<em>no content was provided</em>
</slot>
</div>
```
We can now create instances of `<Box>` without any children:
```html
<Box>
<h2>Hello!</h2>
<p>This is a box. It can contain anything.</p>
</Box>
<Box/>
```