5.6.4.1. Directory Structure
polymer-client/
|-- src/
|   |-- app-shell.html
|   |-- shared-styles.html
|-- images
|   |-- app-icon/
|   |-- favicon.ico
|-- .gitignore
|-- bower.json
|-- gulpfile.js
|-- index.html
|-- manifest.json
|-- package.json
|-- polymer.json
|-- service-worker.js
|-- sw-precache-config.js
src

Folder where components are placed.

package.json

Lists dependencies on Node.js modules which will be used in a build purposes.

bower.json

Lists dependencies on web libraries (primarily web components) which will be used in runtime.

polymer.json

Polymer build configuration.

gulpfile.js

Gulp build file. It’s a right place to add some processing like minification/preprocessors etc. More info: https://github.com/Polymer/polymer-build#polymerproject.

index.html

An application entry point. Contains logic on loading polyfills and <appname>-shell.html import.

manifest.json

Web app manifest. Contains information which used when application is being added to a device’s homescreen. More info: https://developer.mozilla.org/en-US/docs/Web/Manifest

service-worker.js

Service worker stub.

sw-precache-config.js

Config used by sw-precache library in order to generate service worker at build time (disabled by default). See Offline Capabilities.