[app-name]/
  ...
  |__app/
  |   |__components/ # stateless components (e.g. features, shared UI widgets, shared services etc.)
  |   |    |__[component-1] # component 1, e.g `auth`, `profile`, `dashboard` etc.
  |   |    |    |__app.js     # module definition and dependencies
  |   |    |    |__config.js  # component specific configuration
  |   |    |    |__[name]-animation.js        # component specific animation
  |   |    |    |__[name]-animation_test.js   # animation unit test
  |   |    |    |__[name]-filter.js           # component specific filter
  |   |    |    |__[name]-filter_test.js      # filter unit test
  |   |    |    |__[name]-directive.js        # component specific directive (can be a UI widget)
  |   |    |    |__[name]-directive_test.js   # directive unit test
  |   |    |    |__[name]-model.js            # component specific model
  |   |    |    |__[name]-model_test.js       # model unit test
  |   |    |    |__[name]-service.js          # component specific service
  |   |    |    |__[name]-service_test.js     # service unit test 
  |   |    |    |__[component-1].{scss|less}      # component specific CSS
  |   |    |    |__[image-name].{png|gif|jpg}     # component specific images
  |   |    |    |__data/ # component specific JSON data files and related assets
  |   |    |    |__i18n/ # resource files with locale specific localization rules for this component
  |   |    |    |   |__en-US/
  |   |    |    |   |   |__[resource-name-1].json
  |   |    |    |   |   |__[resource-name-2].json
  |   |    |    |   |   |__...
  |   |    |    |   |__fr-FR/
  |   |    |    |      |__...
  |   |    |    |
  |   |    |    |__vendor/ # 3rd party librariess used by this component
  |   |    |    |__[sub-component-1.1]/ # sub-component of component 1, e.g. `signin` or `signout`
  |   |    |         |__config.js           # subcomponent specific config
  |   |    |         |__[name]-animation.js # subcomponent specific animation
  |   |    |         |__... # same structure as `component-1`, except `app.js` module definition
  |   |    |__[component-2] # component 2, e.g. `video-player`, `analytics`, etc.
  |   |    |    |__...
  |   |    |__utils/ # a collection of various utilities not specific to any component, usually implemented as JS pure functions
  |   |         |__checkmark-filter.js
  |   |         |__checkmark-filter_test.js
  |   |         |__string-parser-service.js
  |   |         |__string-parser-service_test.js
  |   |         |__...
  ...