HTMX Integration in Drupal 11.3 Enables Dynamic Forms with Minimal JavaScript

Staff Reporter

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With HTMX now integrated into Drupal core as of version 11.3, developers can create dynamic, AJAX-like interactions using a simplified syntax. In a practical tutorial, Theodore Biadala walks through building a cascading select form using Drupal’s Form API and the new htmx object introduced in core.

The guide covers both inline attribute-based usage and more maintainable out-of-band swaps to preserve form validation behavior. Biadala emphasizes that while there’s no official best practice yet, the API offers multiple flexible paths. The walkthrough is especially useful for developers seeking to implement modern interactivity without relying heavily on custom JavaScript.

Reference: How to use HTMX with forms in Drupal 11.3 by Théodore Biadala (nod_) (13 September 2025)

Drupal 11

Integration

Tutorial

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