The hx-swap-oob attribute allows you 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:

<div id="alerts" hx-swap-oob="true">

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 either true or any valid hx-swap value. If the value is true or outerHTML (which are equivalent) the element will be swapped inline. If not, the elements children will be swapped in by the given swap strategy.