htmx/www/attributes/hx-swap-oob.md

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---
layout: layout.njk
title: </> htmx - hx-swap-oob
---
## `hx-swap-oob`
The `hx-swap-oob` attribute allows you to specify that some content in a response should be
swapped into the DOM somewhere other than the target, that is "Out of Band". This allows you to piggy back updates to other element updates on a response.
Consider the following response HTML:
```html
<div>
...
</div>
<div id="alerts" hx-swap-oob="true">
Saved!
</div>
```
The first div will be swapped into the target the usual manner. The second div, however, will be swapped in as a replacement for the element with the id `alerts`, and will not end up in the target.
The value of the `hx-swap-oob` can be:
* `true`
* any valid [`hx-swap`](/attributes/hx-swap) value
* any valid [`hx-swap`](/attributes/hx-swap) value, followed by a colon, followed by a CSS selector
If the value is `true` or `outerHTML` (which are equivalent) the element will be swapped inline.
If a swap value is given, that swap strategy will be used.
If a selector is given, the first element matching that selector will be swapped. If not, the element with an ID matching the new content will be swapped.
### Notes
* `hx-swap-oob` is not inherited