devdocs/assets/javascripts/app/config.js.erb

app.config = {
  db_filename: 'db.json',
  default_docs: <%= App.default_docs.to_json %>,
  docs_aliases: <%= App.docs_aliases.to_json %>,
  docs_origin: '<%= App.docs_origin %>',
  env: '<%= App.environment %>',
  history_cache_size: 10,
  index_filename: 'index.json',
  index_path: '/<%= App.docs_prefix %>',
  max_results: 50,
  production_host: 'devdocs.io',
  search_param: 'q',
  sentry_dsn: '<%= App.sentry_dsn %>',
  version: <%= Time.now.to_i %>,
  release: <%= Time.now.utc.httpdate.to_json %>,
  mathml_stylesheet: '/mathml.css',
  favicon_spritesheet: '<%= image_path('sprites/docs.png') %>',
  service_worker_path: '/service-worker.js',
  service_worker_enabled: <%= App.environment == :production || ENV['ENABLE_SERVICE_WORKER'] == 'true' %>,
}