Field template for display mode I have a template for my field: field--field-category.html.twig. Is there a way to override this for a specific Display Mode? A have a mode called teaser block. I tried field--teaser-block--field-category.html.twig as well as a couple of other formats.

I know I can modify how the field is output in node--teaser-block.html.twig but I'd like to do it at the field template level.
For the field template there is by default no suggestion with the specific display mode. 

You can add this suggestion in a hook:

function MYTHEME_theme_suggestions_field_alter(&amp;$suggestions, $variables) {
  $suggestions[] = 'field__' . 
    $variables['element']['#field_name'] . '__' . 
    $variables['element']['#view_mode'];
}


Put this into MYTHEME.theme in the theme directory.