I want to add css class to a field inside hook_field_widget_form_alter, but it doesn’t work!

in this link https://api.drupal.org/api/drupal/modules!field!field.api.php/function/hook_field_widget_form_alter/7

it describes that we can add css class to an element in a form via this code

function hook_field_widget_form_alter(&$element, &$form_state, $context) {   // Add a css class to widget form elements for all fields of type mytype.   if ($context['field']['type'] == 'mytype') {     // Be sure not to overwrite existing attributes.     $element['#attributes']['class'][] = 'myclass';   } } 

I tried to use it but it seems $element['#attributes']['class'][] = 'myclass'; doesn’t add any css class to form after rendering.

So how can I add css class to a form element inside hook_field_widget_form_alter() ?

This article was republished from its original source.
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I want to add css class to a field inside hook_field_widget_form_alter, but it doesn’t work!

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