How to add class to content field link in Drupal 8 & 9
Example How to add custom class to content field link in Drupal 8 & 9.
function THEMENAME_preprocess_field(&$variables, $hook) {
$element = $variables['element'];
if ($element['#field_name'] == 'field_link') {
$variables['items'][0]['content']['#options']['attributes']['class'][] = 'btn btn-danger';
}
}
