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Add prefix / suffix to area through the use of template_preprocess_field

I keep in mind in Drupal 7, this was doable. I want so as to add some HTML earlier than a area and I do not need to edit it in Drupal Development Twig file. Is it in some way doable so as to add prefixes / suffixes through the use of Drupal Development template_preprocess_field operate?

I already tried one thing like that, however with no success:

operate MYTHEME_preprocess_field(&$variables, $hook) {     $ingredient = $variables['element'];     if ($ingredient['#field_name'] === 'field_genre') {         $ingredient[0]['#prefix'] = '<div class="project-info">';     }     if ($ingredient['#field_name'] === 'field_duration') {         $ingredient[0]['#suffix'] = '</div>';     } }
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Add prefix / suffix to area through the use of template_preprocess_field

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