Sets a form element's class attribute.

Adds 'required' and 'error' classes as needed.

Parameters

array $element: The form element.

array $class: Array of new class names to be added.

Overrides ElementInterface::setAttributes

21 calls to RenderElementBase::setAttributes()

Checkbox::preRenderCheckbox in core/lib/Drupal/Core/Render/Element/Checkbox.php

Prepares a #type 'checkbox' render element for input.html.twig.

Color::preRenderColor in core/lib/Drupal/Core/Render/Element/Color.php

Prepares a #type 'color' render element for input.html.twig.

Date::preRenderDate in core/lib/Drupal/Core/Render/Element/Date.php

Adds form-specific attributes to a 'date' #type element.

Details::preRenderDetails in core/lib/Drupal/Core/Render/Element/Details.php

Adds form element theming to details.

Email::preRenderEmail in core/lib/Drupal/Core/Render/Element/Email.php

Prepares a #type 'email' render element for input.html.twig.

... See full list

2 methods override RenderElementBase::setAttributes()

FormElement::setAttributes in core/lib/Drupal/Core/Render/Element/FormElement.php

Sets a form element's class attribute.

RenderElement::setAttributes in core/lib/Drupal/Core/Render/Element/RenderElement.php

Sets a form element's class attribute.

File

core/lib/Drupal/Core/Render/Element/RenderElementBase.php, line 132

Class

RenderElementBase

Provides a base class for render element plugins.

Namespace

Drupal\Core\Render\Element

Code

public static function setAttributes(&$element, $class = []) {
  if (!empty($class)) {
    if (!isset($element['#attributes']['class'])) {
      $element['#attributes']['class'] = [];
    }
    $element['#attributes']['class'] = array_merge($element['#attributes']['class'], $class);
  }
  // This function is invoked from form element theme functions, but the
  // rendered form element may not necessarily have been processed by
  // \Drupal::formBuilder()->doBuildForm().
  if (!empty($element['#required'])) {
    $element['#attributes']['class'][] = 'required';
    $element['#attributes']['required'] = 'required';
    $element['#attributes']['aria-required'] = 'true';
  }
  if (isset($element['#parents']) && isset($element['#errors']) && !empty($element['#validated'])) {
    $element['#attributes']['class'][] = 'error';
    $element['#attributes']['aria-invalid'] = 'true';
  }
}

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