I needed to add a 'button' class to a file field link and ran into the following issue:
https://www.drupal.org/node/2575427
I was unable to alter the actual anchor within the twig template.
Adding placeholder text to a Drupal 8 form element that is the label of the form can be done in your .theme file with the hook template_preprocess_input().
/**
* Implements template_preprocess_input().
*/functionMYTHEME_preprocess_input(&$variables){
// Set a placeholder for all search form elements.if ($
I ran into an issue today where I needed to get a themed views title from within a views row style template file (tpl). I tried using drupal_get_title() and menu_get_item() but the title elements were all blank for these. Next I inspected the $views object looking for the themed title but it was not listed. Finally, I discovered within $views->build_info the title and substitutions variables.