How to add class to menu link in Drupal8?

Question

Drupal

I created my theme in Drupal 8, inheriting the Stabil theme. Now I want to add classes to the navigation. I look at the links.html.twig file, and I see . What does item.attributes mean, what should I do to get the class I need in this variable?

Answer 1

{{ item.attributes.addClass('class-name') }}

Answer 2

https://www.drupal.org/project/menu_link_attributes