Stimulus controller not executing (dynamic button disable)
Issue: Despite seemingly correct Stimulus controller (selection_controller.js
) setup, HTML attributes (data-controller
, data-action
, data-target
), and CSS, the "Delete Selected" button remained disabled even when I checked items.
Context: Extensive troubleshooting performed: Verified controller registration (stimulus:manifest:update
, controllers/index.js
), javascript_importmap_tags
in layout, controllers/application.js
initialization. Added console.log
statements; logs did not appear in the browser console, indicating the controller code was not executing. Tested moving data-controller
scope. Checked for conflicts/errors.
Resolution: Due to the inability to diagnose why the Stimulus controller wasn't connecting/executing, I reverted the dynamic disabling feature for simplicity. I deleted the controller file, removed the registration, cleaned the data-
attributes from view/layout, and removed CSS styles.
Learning: If JavaScript behavior (especially Stimulus) fails without obvious errors after checking standard setup (loading, registration, attributes, initialization, console logs), I learned to consider potential deeper issues: asset pipeline problems, JS bundling errors (check network tab/console thoroughly), subtle DOM interactions (e.g., Turbo Frames replacing elements Stimulus was connected to), typos in data-
attributes or controller identifiers, or timing issues. Sometimes reverting to a simpler solution is pragmatic if debugging proves too complex or time-consuming for the feature's value.
Learned on: April 19, 2024
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