collabora_online.libraries.yml

cool.frame:
  css:
    component:
      css/cool.css: {}
  js:
    js/cool.js: {}
  header: true
  dependencies:
    - core/drupal

cool.previewer:
  css:
    component:
      css/cool.css: {}
  js:
    js/previewer.js: {}
  header: true
  dependencies:
    - core/drupal