eldir-add-js-behavior

name: eldir-add-js-behavior description: Add or update Drupal behaviors in Eldir JavaScript. Use when implementing interactive UI behavior that must be attach/detach-safe for AJAX and progressive enhancement.

Eldir Add JS Behavior

1. Add behavior in js/eldir.js under Drupal.behaviors.
2. Use once('<key>', '<selector>', context) for idempotent attach.
3. Use context scoping; do not assume full-document attach.
4. Add detach() cleanup when using intervals, observers, or external listeners.
5. Use Drupal.t() and drupalSettings where appropriate.
6. Ensure no behavior duplicates existing functionality.

Guardrails

• Keep behavior names explicit and prefixed with eldir.
• Prefer small focused behaviors over one large handler.