DanLaufer · October 19, 2018 14:52
diff --git a/Drupal 8 - Add onclick javascript to form submit button in php b/Drupal 8 - Add onclick javascript to form submit button in php
 $form['actions']['submit'] = [
    '#type' => 'submit',
    '#value' => $submit_button_text,
    '#button_type' => 'primary',
    '#attributes' => ['disabled' => 'disabled',
                      'onclick' => "window.open('".$file_url."', '_blank');"],
 ];
	$form['actions']['submit'] = [
	'#type' => 'submit',
	'#value' => $submit_button_text,
	'#button_type' => 'primary',
	'#attributes' => ['disabled' => 'disabled',
	'onclick' => "window.open('".$file_url."', '_blank');"],
	];