synmap-8.x-1.21/synmap.libraries.yml

form:
  css:
    theme:
      assets/css/synmap.css: {}
  js:
    assets/js/form.js: {}
  dependencies:
    #- synmap/yandexmap
    - core/drupalSettings

map:
  css:
    theme:
      assets/css/synmap.css: {}
  js:
    assets/js/map.js: {}
  dependencies:
    - core/drupalSettings

osm_map:
  css:
    theme:
      assets/css/leaflet.css: {}
  js:
    assets/js/leaflet.js: {}
  dependencies:
    - core/drupalSettings

yandexmap:
  js:
    https://api-maps.yandex.ru/2.1/?load=package.full&lang=ru-RU: {type: external, minified: false, attributes: {async: true}}