uuid:
  - value: 1d8e5d0f-d0d9-4e9d-8c05-87ab91016bd5
langcode:
  - value: en
type:
  - target_id: daily_email
    target_type: node_type
    target_uuid: 8bde1f2f-eef9-4f2d-ae9c-96921f8193d7
revision_timestamp:
  - value: '2025-05-11T09:00:07+00:00'
revision_uid:
  - target_type: user
    target_uuid: b8966985-d4b2-42a7-a319-2e94ccfbb849
revision_log: {  }
status:
  - value: true
uid:
  - target_type: user
    target_uuid: b8966985-d4b2-42a7-a319-2e94ccfbb849
title:
  - value: 'CSS, data attributes and feature flags'
created:
  - value: '2024-08-25T00:00:00+00:00'
changed:
  - value: '2025-05-11T09:00:07+00:00'
promote:
  - value: false
sticky:
  - value: false
default_langcode:
  - value: true
revision_translation_affected:
  - value: true
path:
  - alias: /daily/2024/08/25/css--data-attributes-and-feature-flags
    langcode: en
body:
  - value: |
      <p>I recently used <a href="https://www.drupal.org/project/feature_toggle">Drupal's Feature Toggle module</a> to set a data attribute which enabled some new styling for buttons.</p>

      <p>Firstly, within the theme's .theme file, I added this code:</p>

      <pre><code class="php">/**
       * Implements hook_preprocess_html().
       */
      function mytheme_preprocess_html(array &amp;$variables): void {
        $variables['attributes']['data-use-new-button-styles'] = \Drupal::service('feature_toggle.feature_status')-&gt;getStatus('use_the_new_button_styling');
      }
      </code></pre>

      <p>If the feature toggle is enabled, it adds a <code>data-use-new-button-styles=""</code> attribute to the <code>body</code> element.</p>

      <p>If it is disabled, the attribute is not added, so I can write CSS that's applied when the data attribute is present:</p>

      <pre><code class="css">[data-use-new-button-styles] .btn-primary {
        background-color: red;
      }
      </code></pre>

      <p>In a Tailwind CSS project (this isn't), the same could be achiveable with a custom interaction state - similar to <code>hover</code>, <code>focus</code> and <code>active</code>. Something like <code>new-button-styles:bg-red-500</code>.</p>

      <p>I like using feature flags and was happy to find a way to use them when adding this new CSS.</p>

              
    format: full_html
    processed: |
      <p>I recently used <a href="https://www.drupal.org/project/feature_toggle">Drupal's Feature Toggle module</a> to set a data attribute which enabled some new styling for buttons.</p>

      <p>Firstly, within the theme's .theme file, I added this code:</p>

      <pre><code class="php">/**
       * Implements hook_preprocess_html().
       */
      function mytheme_preprocess_html(array &amp;$variables): void {
        $variables['attributes']['data-use-new-button-styles'] = \Drupal::service('feature_toggle.feature_status')-&gt;getStatus('use_the_new_button_styling');
      }
      </code></pre>

      <p>If the feature toggle is enabled, it adds a <code>data-use-new-button-styles=""</code> attribute to the <code>body</code> element.</p>

      <p>If it is disabled, the attribute is not added, so I can write CSS that's applied when the data attribute is present:</p>

      <pre><code class="css">[data-use-new-button-styles] .btn-primary {
        background-color: red;
      }
      </code></pre>

      <p>In a Tailwind CSS project (this isn't), the same could be achiveable with a custom interaction state - similar to <code>hover</code>, <code>focus</code> and <code>active</code>. Something like <code>new-button-styles:bg-red-500</code>.</p>

      <p>I like using feature flags and was happy to find a way to use them when adding this new CSS.</p>

              
    summary: null
field_daily_email_cta: {  }