How to add a taxonomy term value as a class on the taxonomy term field in Drupal 8 and Drupal 9

lakshmi, Credit to volkotech-solutions Sep 22

In Drupal 8/9, use the hook_preprocess_field() function to add a taxonomy term value as a class on the taxonomy term field in the .theme file.

themename.theme

<?php
use Drupal\taxonomy\Entity\Term;
use Drupal\Component\Utility\Html;

/**
 * Implements hook_preprocess_field().
 */
function themename_preprocess_field(&$variables) {
  // here field_term is a machine name of entity reference taxonomy term field.
  if ($variables['field_name'] == 'field_term') {

    if (!$variables['element']['#items']->isEmpty()) {

      // Get the term ID.
      $tid = $variables['element']['#items']->getValue()[0]['target_id'];

      // Load the term.
      $term = Term::load($tid);

      // Get the term name.
      $name = $term->getName();

      // Make the term name safe to be used as CSS class.
      $name_safe = strtolower(Html::cleanCssIdentifier($name));

      // Add class.
      $variables['attributes']['class'][] = str_replace("-", " ", $name);;
    };
  }
}

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Muna Vijaya Lakshmi

Drupal developer at VolkoTech Solutions

Drupal backend developer having 2+ years of experience in Drupal site development(8 & 9) with Developing Custom modules and Overriding theme concepts.

VolkoTech Solutions

Drupal development company in india

Drupal web development & Consulting company in India.

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How to add a taxonomy term value as a class on the taxonomy term field in Drupal 8 and Drupal 9

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Muna Vijaya Lakshmi

VolkoTech Solutions

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How to add a taxonomy term value as a class on the taxonomy term field in Drupal 8 and Drupal 9

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