HTMX hx-ext attribute (enables an htmx extension for an element and all its children)


The hx-ext attribute enables an htmx extension for an element and all its children.

The value can be a single extension name or a comma separated list of extensions to apply.

The hx-ext tag may be placed on parent elements if you want a plugin to apply to an entire swath of the DOM, and on the body tag for it to apply to all htmx requests.


  • hx-ext is both inherited and merged with parent elements, so you can specify extensions on any element in the DOM hierarchy and it will apply to all child elements.

  • You can ignore an extension that is defined by a parent node using hx-ext=”ignore:extensionName”

Use examples

Djangonauts don’t let djangonauts write Javascript

<div hx-ext="preload">
  <a href="/my-next-page" preload="mouseover" preload-images="true">Next Page</a>