}
$form['attributes']['alt'] = [
'#title' => $this->t('Alternative text'),
- '#placeholder' => $this->t('Short description for the visually impaired'),
+ '#description' => $this->t('Short description of the image used by screen readers and displayed when the image is not loaded. This is important for accessibility.'),
'#type' => 'textfield',
'#required' => TRUE,
'#required_error' => $this->t('Alternative text is required.<br />(Only in rare cases should this be left empty. To create empty alternative text, enter <code>""</code> — two double quotes without any content).'),